diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
new file mode 100644
index 000000000..ca9d117ae
--- /dev/null
+++ b/.github/workflows/performance.yml
@@ -0,0 +1,140 @@
+name: Performance
+
+on:
+  pull_request:
+    branches: [ main ]
+
+# Cancel in-flight perf runs on the same PR to free runner capacity.
+concurrency:
+  group: perf-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  perf-regression:
+    runs-on: ubuntu-latest
+    # Headroom for two full benchmark runs (candidate + baseline) plus npm
+    # installs and tarball packing. Each benchmark run is bounded by
+    # samples * scenarios * (warmup + duration + per-child init).
+    timeout-minutes: 40
+    env:
+      NODE_VERSION: '22.x'
+      PERF_SAMPLES: '3'
+      PERF_DURATION: '5'
+      PERF_WARMUP: '1'
+      PERF_REGRESSION_THRESHOLD: '15'
+
+    steps:
+      - name: Checkout PR (candidate)
+        uses: actions/checkout@v4
+        with:
+          path: pr
+
+      - name: Checkout base branch (baseline)
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.base.ref }}
+          path: baseline
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+
+      # ---- Build & pack BOTH versions of the package up-front ----
+      - name: Generate dummy TLS certs (PR)
+        working-directory: pr
+        run: openssl req -x509 -nodes -newkey rsa -keyout ./test/certs/server-key.pem -out ./test/certs/server-cert.pem -days 1 -subj "/C=CL/ST=RM/L=OpenTelemetryTest/O=Root/OU=Test/CN=ca"
+
+      - name: Install + build + pack candidate
+        working-directory: pr
+        run: |
+          npm ci
+          npm run build
+          npm pack
+          mv applicationinsights-*.tgz "$GITHUB_WORKSPACE/candidate.tgz"
+
+      - name: Generate dummy TLS certs (baseline)
+        working-directory: baseline
+        run: openssl req -x509 -nodes -newkey rsa -keyout ./test/certs/server-key.pem -out ./test/certs/server-cert.pem -days 1 -subj "/C=CL/ST=RM/L=OpenTelemetryTest/O=Root/OU=Test/CN=ca"
+
+      - name: Install + build + pack baseline
+        working-directory: baseline
+        run: |
+          npm ci
+          npm run build
+          npm pack
+          mv applicationinsights-*.tgz "$GITHUB_WORKSPACE/baseline.tgz"
+
+      # ---- Use the PR's perf harness for BOTH runs (consistent code) ----
+      - name: Install perf harness deps (PR)
+        working-directory: pr/test/performanceTests
+        run: npm ci
+
+      - name: Install CANDIDATE applicationinsights into perf harness
+        working-directory: pr/test/performanceTests
+        run: npm install --no-save --no-package-lock "$GITHUB_WORKSPACE/candidate.tgz"
+
+      - name: Build perf harness (TS -> dist-esm)
+        working-directory: pr/test/performanceTests
+        run: npm run build
+
+      - name: Run candidate benchmarks
+        working-directory: pr/test/performanceTests
+        run: |
+          node runBenchmarks.mjs \
+            --out "$GITHUB_WORKSPACE/candidate.json" \
+            --samples "$PERF_SAMPLES" \
+            --duration "$PERF_DURATION" \
+            --warmup "$PERF_WARMUP"
+
+      - name: Install BASELINE applicationinsights into perf harness
+        working-directory: pr/test/performanceTests
+        run: npm install --no-save --no-package-lock "$GITHUB_WORKSPACE/baseline.tgz"
+
+      - name: Run baseline benchmarks
+        working-directory: pr/test/performanceTests
+        run: |
+          node runBenchmarks.mjs \
+            --out "$GITHUB_WORKSPACE/baseline.json" \
+            --samples "$PERF_SAMPLES" \
+            --duration "$PERF_DURATION" \
+            --warmup "$PERF_WARMUP"
+
+      # ---- Compare and publish ----
+      - name: Compare results
+        id: compare
+        working-directory: pr/test/performanceTests
+        run: |
+          set +e
+          node comparePerf.mjs \
+            "$GITHUB_WORKSPACE/baseline.json" \
+            "$GITHUB_WORKSPACE/candidate.json" \
+            "$GITHUB_WORKSPACE/perf-comparison.md"
+          echo "exit=$?" >> "$GITHUB_OUTPUT"
+
+      - name: Upload raw results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: perf-results
+          path: |
+            baseline.json
+            candidate.json
+            perf-comparison.md
+
+      - name: Comment on PR (best-effort)
+        if: always() && github.event.pull_request.head.repo.full_name == github.repository
+        uses: marocchino/sticky-pull-request-comment@v2
+        continue-on-error: true
+        with:
+          header: perf-regression
+          path: perf-comparison.md
+
+      - name: Fail job on gating regression
+        if: steps.compare.outputs.exit != '0'
+        run: |
+          echo "Performance regression beyond ${PERF_REGRESSION_THRESHOLD}% detected." >&2
+          exit 1
diff --git a/test/performanceTests/README.md b/test/performanceTests/README.md
index 5480f367d..757c537a8 100644
--- a/test/performanceTests/README.md
+++ b/test/performanceTests/README.md
@@ -1,10 +1,46 @@
-### Guide
+### Performance Tests
 
-1. Copy the `sample.env` file and name it as `.env`.
-2. Create an Application Insights resource and populate the `.env` file with connectionString.
-3. Run the tests as follows (parameters can be modified to as appropriate):
+The performance test harness measures throughput (ops/s) for hot-path APIs in
+this package and reports them against an upstream-OpenTelemetry-only baseline.
 
-- Tracking Dependencies (spans)
-  - `npm run perf-test:node -- TrackDependencyTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
-- Tracking Traces (logs)
-  - `npm run perf-test:node -- TrackTraceTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+#### Manual run
+
+1. Copy `sample.env` to `.env` and set `APPLICATIONINSIGHTS_CONNECTION_STRING`
+   (any well-formed connection string works; the perf path never sends data
+   when an unreachable ingestion endpoint is configured).
+2. Run a single scenario via the existing harness:
+
+   - `npm run perf-test:node -- TrackDependencyTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+   - `npm run perf-test:node -- TrackTraceTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+   - `npm run perf-test:node -- AzureMonitorSpanTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+   - `npm run perf-test:node -- AzureMonitorLogTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+   - `npm run perf-test:node -- OtelSpanTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+   - `npm run perf-test:node -- OtelLogTest --warmup 1 --iterations 1 --parallel 2 --duration 15`
+
+3. Or run every scenario and produce a JSON summary suitable for comparison:
+
+   `npm run perf:benchmark -- --out results.json --samples 3 --duration 5`
+
+#### Scenario tiers
+
+| Scenario | Tier | What it measures |
+|---|---|---|
+| `TrackDependencyTest` | gating | `appInsights.defaultClient.trackDependency()` via the v2 shim |
+| `TrackTraceTest` | gating | `appInsights.defaultClient.trackTrace()` via the v2 shim |
+| `AzureMonitorSpanTest` | gating | `useAzureMonitor()` + `tracer.startSpan()` |
+| `AzureMonitorLogTest` | gating | `useAzureMonitor()` + `logger.emit()` |
+| `OtelSpanTest` | informational | Upstream `@opentelemetry/sdk-trace-base` only |
+| `OtelLogTest` | informational | Upstream `@opentelemetry/sdk-logs` only |
+
+Only **gating** scenarios block CI on regression. Upstream-OTel scenarios are
+reported as a reference for like-for-like comparison and are not owned by this
+repo, so they are never used for gate-fail decisions.
+
+#### Regression CI
+
+`.github/workflows/performance.yml` runs on every PR. It packs both the PR and
+the base branch as tarballs, installs each in turn under the PR's perf harness,
+runs the benchmark suite, and fails the job (blocking merge when set as a
+required check) if any gating scenario regresses beyond
+`PERF_REGRESSION_THRESHOLD` percent (default 15%). A sticky comment with the
+full comparison table is posted to the PR.
diff --git a/test/performanceTests/bench.mjs b/test/performanceTests/bench.mjs
new file mode 100644
index 000000000..12c204a60
--- /dev/null
+++ b/test/performanceTests/bench.mjs
@@ -0,0 +1,109 @@
+#!/usr/bin/env node
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+/*
+ * Measures throughput of a single scenario directly, without going through
+ * the @azure-tools/test-perf framework's worker pool. Running in a single
+ * process makes JSON output and result capture deterministic, and a fresh
+ * Node child per scenario keeps OpenTelemetry global state isolated.
+ *
+ * Usage:
+ *   node bench.mjs --scenario <Name> --duration <sec> --warmup <sec> --out <file>
+ */
+
+import { writeFileSync } from "node:fs";
+
+function parseArgs(argv) {
+    const a = { duration: 8, warmup: 2 };
+    for (let i = 0; i < argv.length; i++) {
+        const k = argv[i];
+        const v = () => argv[++i];
+        if (k === "--scenario") a.scenario = v();
+        else if (k === "--duration") a.duration = Number(v());
+        else if (k === "--warmup") a.warmup = Number(v());
+        else if (k === "--out") a.out = v();
+    }
+    if (!a.scenario || !a.out) {
+        console.error("Required: --scenario <Name> --out <file>");
+        process.exit(2);
+    }
+    return a;
+}
+
+const SCENARIO_MODULES = {
+    TrackDependencyTest: "./dist-esm/trackDependency.spec.js",
+    TrackTraceTest: "./dist-esm/trackTrace.spec.js",
+    AzureMonitorSpanTest: "./dist-esm/azureMonitorSpan.spec.js",
+    AzureMonitorLogTest: "./dist-esm/azureMonitorLog.spec.js",
+    OtelSpanTest: "./dist-esm/otelSpan.spec.js",
+    OtelLogTest: "./dist-esm/otelLog.spec.js",
+};
+
+async function runLoop(instance, durationMs) {
+    // Tight async loop. We rely on each .run() awaiting only synchronous-ish
+    // work (the scenarios under test do not perform real network I/O). The
+    // loop polls Date.now() infrequently (every BATCH iterations) to keep
+    // measurement overhead negligible.
+    const deadline = Date.now() + durationMs;
+    let ops = 0;
+    const BATCH = 256;
+    while (true) {
+        for (let i = 0; i < BATCH; i++) {
+            await instance.run();
+        }
+        ops += BATCH;
+        if (Date.now() >= deadline) break;
+    }
+    return ops;
+}
+
+async function main() {
+    const args = parseArgs(process.argv.slice(2));
+    const modulePath = SCENARIO_MODULES[args.scenario];
+    if (!modulePath) {
+        console.error(`Unknown scenario: ${args.scenario}`);
+        process.exit(2);
+    }
+    const mod = await import(modulePath);
+    const Cls = mod[args.scenario];
+    if (!Cls) {
+        console.error(`Module ${modulePath} does not export ${args.scenario}`);
+        process.exit(2);
+    }
+    const instance = new Cls();
+
+    // Warmup (not counted)
+    if (args.warmup > 0) {
+        await runLoop(instance, args.warmup * 1000);
+    }
+
+    const startWall = Date.now();
+    const ops = await runLoop(instance, args.duration * 1000);
+    const elapsedMs = Date.now() - startWall;
+    const opsPerSec = (ops / elapsedMs) * 1000;
+
+    writeFileSync(
+        args.out,
+        JSON.stringify(
+            {
+                scenario: args.scenario,
+                opsPerSec,
+                ops,
+                elapsedMs,
+                timestamp: new Date().toISOString(),
+            },
+            null,
+            2,
+        ),
+    );
+
+    console.log(
+        `[bench] ${args.scenario}: ${ops} ops in ${elapsedMs}ms => ${opsPerSec.toFixed(0)} ops/s`,
+    );
+}
+
+main().catch((err) => {
+    console.error(err);
+    process.exit(1);
+});
diff --git a/test/performanceTests/comparePerf.mjs b/test/performanceTests/comparePerf.mjs
new file mode 100644
index 000000000..7cb5c82ec
--- /dev/null
+++ b/test/performanceTests/comparePerf.mjs
@@ -0,0 +1,106 @@
+#!/usr/bin/env node
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+/*
+ * Compares two perf result JSON files produced by runBenchmarks.mjs.
+ *
+ * Usage:
+ *   node comparePerf.mjs baseline.json candidate.json [markdown.md]
+ *
+ * Environment:
+ *   PERF_REGRESSION_THRESHOLD  Percent regression that fails the gate (default 15)
+ *
+ * Exit codes:
+ *   0  no gating regression beyond threshold
+ *   1  one or more gating scenarios regressed beyond threshold
+ *   2  invalid input
+ */
+
+import { readFileSync, writeFileSync } from "node:fs";
+
+function loadResults(path) {
+    const data = JSON.parse(readFileSync(path, "utf8"));
+    const map = new Map();
+    for (const r of data.results) {
+        map.set(r.name, r);
+    }
+    return { meta: data, map };
+}
+
+const [baselinePath, candidatePath, markdownPath] = process.argv.slice(2);
+if (!baselinePath || !candidatePath) {
+    console.error("Usage: comparePerf.mjs <baseline.json> <candidate.json> [markdown.md]");
+    process.exit(2);
+}
+
+const threshold = Number(process.env.PERF_REGRESSION_THRESHOLD || "15");
+
+const baseline = loadResults(baselinePath);
+const candidate = loadResults(candidatePath);
+
+const rows = [];
+const regressions = [];
+
+for (const [name, b] of baseline.map) {
+    const c = candidate.map.get(name);
+    if (!c) {
+        rows.push({ name, tier: b.tier, status: "missing in candidate" });
+        continue;
+    }
+    // Positive deltaPct means improvement (more ops/s); negative means regression.
+    const deltaPct = ((c.median - b.median) / b.median) * 100;
+    const row = {
+        name,
+        tier: b.tier,
+        baselineMedian: b.median,
+        candidateMedian: c.median,
+        deltaPct,
+    };
+    rows.push(row);
+    if (b.tier === "gating" && deltaPct < -threshold) {
+        regressions.push(row);
+    }
+}
+
+// Scenarios present only in candidate (e.g. newly added) are informational.
+for (const [name, c] of candidate.map) {
+    if (!baseline.map.has(name)) {
+        rows.push({ name, tier: c.tier, status: "new in candidate", candidateMedian: c.median });
+    }
+}
+
+const fmt = (n) => (Number.isFinite(n) ? n.toFixed(2) : "n/a");
+const arrow = (d) => (d > 0 ? "🟢" : d < 0 ? "🔴" : "⚪");
+
+let md = `## Performance comparison\n\n`;
+md += `Threshold for gating regression: **-${threshold}%** (median ops/s)\n\n`;
+md += `| Scenario | Tier | Baseline (ops/s) | Candidate (ops/s) | Δ % |\n`;
+md += `|---|---|---:|---:|---:|\n`;
+for (const r of rows) {
+    if (r.status) {
+        md += `| \`${r.name}\` | ${r.tier} | ${r.status} | ${fmt(r.candidateMedian)} | n/a |\n`;
+        continue;
+    }
+    md += `| \`${r.name}\` | ${r.tier} | ${fmt(r.baselineMedian)} | ${fmt(r.candidateMedian)} | ${arrow(r.deltaPct)} ${fmt(r.deltaPct)}% |\n`;
+}
+
+if (regressions.length) {
+    md += `\n### ❌ Gating regressions\n\n`;
+    for (const r of regressions) {
+        md += `- \`${r.name}\`: ${fmt(r.deltaPct)}% (baseline ${fmt(r.baselineMedian)} → candidate ${fmt(r.candidateMedian)} ops/s)\n`;
+    }
+} else {
+    md += `\n### ✅ No gating regression beyond threshold.\n`;
+}
+
+md += `\n<sub>baseline: ${baseline.meta.generatedAt} (node ${baseline.meta.node}, ${baseline.meta.samples} samples × ${baseline.meta.duration}s)</sub>\n`;
+md += `<sub>candidate: ${candidate.meta.generatedAt} (node ${candidate.meta.node}, ${candidate.meta.samples} samples × ${candidate.meta.duration}s)</sub>\n`;
+
+console.log(md);
+
+if (markdownPath) {
+    writeFileSync(markdownPath, md);
+}
+
+process.exit(regressions.length ? 1 : 0);
diff --git a/test/performanceTests/package-lock.json b/test/performanceTests/package-lock.json
index 71c0f6426..0ab57e3e7 100644
--- a/test/performanceTests/package-lock.json
+++ b/test/performanceTests/package-lock.json
@@ -11,8 +11,9 @@
       "dependencies": {
         "@azure-tools/test-perf": "^1.0.0",
         "@opentelemetry/api": "^1.9.0",
-        "@opentelemetry/api-logs": "^0.52.1",
-        "@opentelemetry/sdk-logs": "^0.52.1",
+        "@opentelemetry/api-logs": "^0.217.0",
+        "@opentelemetry/sdk-logs": "^0.217.0",
+        "@opentelemetry/sdk-trace-base": "^2.7.1",
         "applicationinsights": "^3.2.2",
         "dotenv": "^16.4.5",
         "tslib": "^2.6.2"
@@ -312,15 +313,6 @@
         "@opentelemetry/api": ">=1.4.0 <1.10.0"
       }
     },
-    "node_modules/@azure/monitor-opentelemetry-exporter/node_modules/@opentelemetry/semantic-conventions": {
-      "version": "1.37.0",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/semantic-conventions/-/semantic-conventions-1.37.0.tgz",
-      "integrity": "sha512-JD6DerIKdJGmRp4jQyX5FlrQjA4tjOw1cvfsPAZXfOOEErMUHjPcPSICS+6WnM0nB0efSFARh0KAZss+bvExOA==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/@azure/monitor-opentelemetry/node_modules/@opentelemetry/api-logs": {
       "version": "0.204.0",
       "resolved": "https://registry.npmjs.org/@opentelemetry/api-logs/-/api-logs-0.204.0.tgz",
@@ -381,15 +373,6 @@
         "@opentelemetry/api": ">=1.4.0 <1.10.0"
       }
     },
-    "node_modules/@azure/monitor-opentelemetry/node_modules/@opentelemetry/semantic-conventions": {
-      "version": "1.37.0",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/semantic-conventions/-/semantic-conventions-1.37.0.tgz",
-      "integrity": "sha512-JD6DerIKdJGmRp4jQyX5FlrQjA4tjOw1cvfsPAZXfOOEErMUHjPcPSICS+6WnM0nB0efSFARh0KAZss+bvExOA==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/@azure/msal-browser": {
       "version": "4.24.0",
       "resolved": "https://registry.npmjs.org/@azure/msal-browser/-/msal-browser-4.24.0.tgz",
@@ -455,21 +438,6 @@
         "node": ">=8.0.0"
       }
     },
-    "node_modules/@azure/opentelemetry-instrumentation-azure-sdk/node_modules/@opentelemetry/core": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/core/-/core-2.1.0.tgz",
-      "integrity": "sha512-RMEtHsxJs/GiHHxYT58IY57UXAQTuUnZVco6ymDEqTNlJKTimM4qPUPVe8InNFyBjhHBEAx4k3Q8LtNayBsbUQ==",
-      "license": "Apache-2.0",
-      "dependencies": {
-        "@opentelemetry/semantic-conventions": "^1.29.0"
-      },
-      "engines": {
-        "node": "^18.19.0 || >=20.6.0"
-      },
-      "peerDependencies": {
-        "@opentelemetry/api": ">=1.0.0 <1.10.0"
-      }
-    },
     "node_modules/@azure/opentelemetry-instrumentation-azure-sdk/node_modules/@opentelemetry/instrumentation": {
       "version": "0.200.0",
       "resolved": "https://registry.npmjs.org/@opentelemetry/instrumentation/-/instrumentation-0.200.0.tgz",
@@ -489,15 +457,6 @@
         "@opentelemetry/api": "^1.3.0"
       }
     },
-    "node_modules/@azure/opentelemetry-instrumentation-azure-sdk/node_modules/@opentelemetry/semantic-conventions": {
-      "version": "1.37.0",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/semantic-conventions/-/semantic-conventions-1.37.0.tgz",
-      "integrity": "sha512-JD6DerIKdJGmRp4jQyX5FlrQjA4tjOw1cvfsPAZXfOOEErMUHjPcPSICS+6WnM0nB0efSFARh0KAZss+bvExOA==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/@colors/colors": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/@colors/colors/-/colors-1.6.0.tgz",
@@ -743,20 +702,20 @@
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
       "integrity": "sha512-3giAOQvZiH5F9bMlMiv8+GSPMeqg0dbaeo58/0SlA9sxSqZhnUtxzX9/2FzyhS9sWQf5S0GJE0AKBrFqjpeYcg==",
-      "peer": true,
       "engines": {
         "node": ">=8.0.0"
       }
     },
     "node_modules/@opentelemetry/api-logs": {
-      "version": "0.52.1",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/api-logs/-/api-logs-0.52.1.tgz",
-      "integrity": "sha512-qnSqB2DQ9TPP96dl8cDubDvrUyWc0/sK81xHTK8eSUspzDM3bsewX903qclQFvVhgStjRWdC5bLb3kQqMkfV5A==",
+      "version": "0.217.0",
+      "resolved": "https://registry.npmjs.org/@opentelemetry/api-logs/-/api-logs-0.217.0.tgz",
+      "integrity": "sha512-Cdq0jW2lknrNfrAm92MyEAvpe2cRsKjdnQLHUL6xRA4IVUnsWx6P65E7NcUO0Y+L4w1Aee5iV8FvjSwd+lrs9A==",
+      "license": "Apache-2.0",
       "dependencies": {
-        "@opentelemetry/api": "^1.0.0"
+        "@opentelemetry/api": "^1.3.0"
       },
       "engines": {
-        "node": ">=14"
+        "node": ">=8.0.0"
       }
     },
     "node_modules/@opentelemetry/context-async-hooks": {
@@ -772,14 +731,15 @@
       }
     },
     "node_modules/@opentelemetry/core": {
-      "version": "1.25.1",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/core/-/core-1.25.1.tgz",
-      "integrity": "sha512-GeT/l6rBYWVQ4XArluLVB6WWQ8flHbdb6r2FCHC3smtdOAbrJBIv35tpV/yp9bmYUJf+xmZpu9DRTIeJVhFbEQ==",
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/@opentelemetry/core/-/core-2.7.1.tgz",
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-    "node_modules/applicationinsights/node_modules/@opentelemetry/semantic-conventions": {
-      "version": "1.37.0",
-      "resolved": "https://registry.npmjs.org/@opentelemetry/semantic-conventions/-/semantic-conventions-1.37.0.tgz",
-      "integrity": "sha512-JD6DerIKdJGmRp4jQyX5FlrQjA4tjOw1cvfsPAZXfOOEErMUHjPcPSICS+6WnM0nB0efSFARh0KAZss+bvExOA==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
@@ -3137,7 +2923,6 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/diagnostic-channel/-/diagnostic-channel-1.1.1.tgz",
       "integrity": "sha512-r2HV5qFkUICyoaKlBEpLKHjxMXATUf/l+h8UZPGBHGLy4DDiY2sOLcIctax4eRnTw5wH2jTMExLntGPJ8eOJxw==",
-      "peer": true,
       "dependencies": {
         "semver": "^7.5.3"
       }
@@ -3220,7 +3005,6 @@
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-8.57.0.tgz",
       "integrity": "sha512-dZ6+mexnaTIbSBZWgou51U6OmzIhYM2VcNdtiTtI7qPNZm35Akpr0f6vtw3w1Kmn5PYo+tZVfh13WrhpS6oLqQ==",
       "dev": true,
-      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.2.0",
         "@eslint-community/regexpp": "^4.6.1",
diff --git a/test/performanceTests/package.json b/test/performanceTests/package.json
index 1190cf919..ccefbedde 100644
--- a/test/performanceTests/package.json
+++ b/test/performanceTests/package.json
@@ -11,8 +11,9 @@
   "dependencies": {
     "@azure-tools/test-perf": "^1.0.0",
     "@opentelemetry/api": "^1.9.0",
-    "@opentelemetry/api-logs": "^0.52.1",
-    "@opentelemetry/sdk-logs": "^0.52.1",
+    "@opentelemetry/api-logs": "^0.217.0",
+    "@opentelemetry/sdk-logs": "^0.217.0",
+    "@opentelemetry/sdk-trace-base": "^2.7.1",
     "applicationinsights": "^3.2.2",
     "dotenv": "^16.4.5",
     "tslib": "^2.6.2"
@@ -26,6 +27,8 @@
   "private": true,
   "scripts": {
     "perf-test:node": "npm run build && node dist-esm/index.spec.js",
+    "perf:benchmark": "npm run build && node runBenchmarks.mjs",
+    "perf:compare": "node comparePerf.mjs",
     "audit": "node ../../../common/scripts/rush-audit.js && rimraf node_modules package-lock.json && npm i --package-lock-only 2>&1 && npm audit",
     "build": "npm run clean && tsc -p .",
     "build:samples": "echo skipped",
diff --git a/test/performanceTests/runBenchmarks.mjs b/test/performanceTests/runBenchmarks.mjs
new file mode 100644
index 000000000..a015eed8c
--- /dev/null
+++ b/test/performanceTests/runBenchmarks.mjs
@@ -0,0 +1,151 @@
+#!/usr/bin/env node
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+/*
+ * Runs each scenario via bench.mjs in a fresh Node child process to avoid
+ * OpenTelemetry global-state contamination across scenarios. Each scenario
+ * is sampled N times; median ops/s is recorded.
+ *
+ * Usage:
+ *   node runBenchmarks.mjs --out results.json [--samples 5] [--duration 8]
+ *                          [--warmup 2]       [--scenarios a,b,c]
+ */
+
+import { spawnSync } from "node:child_process";
+import { readFileSync, writeFileSync, mkdtempSync, rmSync } from "node:fs";
+import { join, dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+import { tmpdir } from "node:os";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+// "gating" scenarios block the PR on regression; "informational" are reported
+// but never fail the build. Upstream-OTel benchmarks are informational since
+// regressions there are not owned by this repository.
+const SCENARIOS = [
+    { name: "TrackDependencyTest", tier: "gating" },
+    { name: "TrackTraceTest", tier: "gating" },
+    { name: "AzureMonitorSpanTest", tier: "gating" },
+    { name: "AzureMonitorLogTest", tier: "gating" },
+    { name: "OtelSpanTest", tier: "informational" },
+    { name: "OtelLogTest", tier: "informational" },
+];
+
+function parseArgs(argv) {
+    const args = { samples: 5, duration: 8, warmup: 2 };
+    for (let i = 0; i < argv.length; i++) {
+        const a = argv[i];
+        const next = () => argv[++i];
+        if (a === "--out") args.out = next();
+        else if (a === "--samples") args.samples = Number(next());
+        else if (a === "--duration") args.duration = Number(next());
+        else if (a === "--warmup") args.warmup = Number(next());
+        else if (a === "--scenarios") args.scenarios = next().split(",");
+    }
+    if (!args.out) {
+        console.error("--out <file> is required");
+        process.exit(1);
+    }
+    return args;
+}
+
+function median(nums) {
+    const sorted = [...nums].sort((a, b) => a - b);
+    const mid = Math.floor(sorted.length / 2);
+    return sorted.length % 2 ? sorted[mid] : (sorted[mid - 1] + sorted[mid]) / 2;
+}
+function mean(nums) {
+    return nums.reduce((a, b) => a + b, 0) / nums.length;
+}
+function stdev(nums) {
+    const m = mean(nums);
+    const variance = nums.reduce((sum, n) => sum + (n - m) ** 2, 0) / nums.length;
+    return Math.sqrt(variance);
+}
+
+function runOne(scenario, args, outPath) {
+    const child = spawnSync(
+        process.execPath,
+        [
+            join(__dirname, "bench.mjs"),
+            "--scenario",
+            scenario,
+            "--duration",
+            String(args.duration),
+            "--warmup",
+            String(args.warmup),
+            "--out",
+            outPath,
+        ],
+        {
+            cwd: __dirname,
+            stdio: ["ignore", "inherit", "inherit"],
+        },
+    );
+    if (child.error) {
+        throw new Error(
+            `Scenario ${scenario} could not be spawned: ${child.error.message}`,
+        );
+    }
+    if (child.signal) {
+        throw new Error(`Scenario ${scenario} terminated by signal ${child.signal}`);
+    }
+    if (child.status !== 0) {
+        throw new Error(`Scenario ${scenario} failed with exit code ${child.status}`);
+    }
+    const result = JSON.parse(readFileSync(outPath, "utf8"));
+    if (!isFinite(result.opsPerSec)) {
+        throw new Error(`Scenario ${scenario} produced no ops/s value`);
+    }
+    return result.opsPerSec;
+}
+
+function main() {
+    const args = parseArgs(process.argv.slice(2));
+    const selected = args.scenarios
+        ? SCENARIOS.filter((s) => args.scenarios.includes(s.name))
+        : SCENARIOS;
+
+    const tmp = mkdtempSync(join(tmpdir(), "perf-"));
+    const results = [];
+
+    try {
+        for (const scenario of selected) {
+            const samples = [];
+            for (let i = 0; i < args.samples; i++) {
+                const out = join(tmp, `${scenario.name}-${i}.json`);
+                console.log(`\n[run] ${scenario.name} sample ${i + 1}/${args.samples}`);
+                const ops = runOne(scenario.name, args, out);
+                samples.push(ops);
+            }
+            results.push({
+                name: scenario.name,
+                tier: scenario.tier,
+                samples,
+                median: median(samples),
+                mean: mean(samples),
+                stdev: stdev(samples),
+            });
+        }
+    } finally {
+        try {
+            rmSync(tmp, { recursive: true, force: true });
+        } catch {
+            /* noop */
+        }
+    }
+
+    const out = {
+        generatedAt: new Date().toISOString(),
+        node: process.version,
+        samples: args.samples,
+        duration: args.duration,
+        warmup: args.warmup,
+        results,
+    };
+    writeFileSync(args.out, JSON.stringify(out, null, 2));
+    console.log(`\nWrote ${args.out}`);
+}
+
+main();
diff --git a/test/performanceTests/test/appInsightsShim.spec.ts b/test/performanceTests/test/appInsightsShim.spec.ts
index 886ddc9c7..d0fe78608 100644
--- a/test/performanceTests/test/appInsightsShim.spec.ts
+++ b/test/performanceTests/test/appInsightsShim.spec.ts
@@ -6,11 +6,23 @@ import appInsights from "applicationinsights";
 import dotenv from "dotenv";
 dotenv.config();
 
+let started = false;
+function ensureStarted(): void {
+  if (started) {
+    return;
+  }
+  appInsights
+    .setup(
+      process.env.APPLICATIONINSIGHTS_CONNECTION_STRING ||
+        "InstrumentationKey=00000000-0000-0000-0000-000000000000;IngestionEndpoint=https://localhost/",
+    )
+    .start();
+  started = true;
+}
+
 export abstract class ShimTest<TOptions> extends PerfTest<TOptions> {
   constructor() {
     super();
-    appInsights
-      .setup(process.env.APPLICATIONINSIGHTS_CONNECTION_STRING || "<your-connection-string>")
-      .start();
+    ensureStarted();
   }
 }
diff --git a/test/performanceTests/test/azureMonitorLog.spec.ts b/test/performanceTests/test/azureMonitorLog.spec.ts
new file mode 100644
index 000000000..5c4d43020
--- /dev/null
+++ b/test/performanceTests/test/azureMonitorLog.spec.ts
@@ -0,0 +1,55 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+// Scenario: log emission via this package's modern `useAzureMonitor` API
+// plus the OpenTelemetry logs API. Gated for regression.
+//
+// We acquire `@opentelemetry/api-logs` via `createRequire` resolved from the
+// installed `applicationinsights` package, so the Logger we benchmark is
+// backed by the SAME api-logs instance that `useAzureMonitor()` registered
+// its LoggerProvider on. Without this, if npm installs a duplicate copy of
+// `@opentelemetry/api-logs` at the harness level, `logs.getLogger()` returns
+// a no-op proxy and the benchmark silently measures nothing.
+
+import { createRequire } from "node:module";
+import { PerfOptionDictionary, PerfTest } from "@azure-tools/test-perf";
+import { useAzureMonitor } from "applicationinsights";
+import dotenv from "dotenv";
+dotenv.config();
+
+type AzureMonitorLogOptions = Record<string, unknown>;
+
+const harnessRequire = createRequire(import.meta.url);
+const aiEntry = harnessRequire.resolve("applicationinsights");
+const aiRequire = createRequire(aiEntry);
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const { logs } = aiRequire("@opentelemetry/api-logs") as any;
+
+let initialized = false;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let logger: any;
+function ensureInit(): void {
+  if (initialized) return;
+  useAzureMonitor({
+    azureMonitorExporterOptions: {
+      connectionString:
+        process.env.APPLICATIONINSIGHTS_CONNECTION_STRING ||
+        "InstrumentationKey=00000000-0000-0000-0000-000000000000;IngestionEndpoint=https://localhost/",
+    },
+  });
+  logger = logs.getLogger("perf-azure-monitor-log");
+  initialized = true;
+}
+
+export class AzureMonitorLogTest extends PerfTest<AzureMonitorLogOptions> {
+  public options: PerfOptionDictionary<AzureMonitorLogOptions> = {};
+
+  constructor() {
+    super();
+    ensureInit();
+  }
+
+  async run(): Promise<void> {
+    logger.emit({ body: "trace message" });
+  }
+}
diff --git a/test/performanceTests/test/azureMonitorSpan.spec.ts b/test/performanceTests/test/azureMonitorSpan.spec.ts
new file mode 100644
index 000000000..dad8843b7
--- /dev/null
+++ b/test/performanceTests/test/azureMonitorSpan.spec.ts
@@ -0,0 +1,62 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+// Scenario: span emission via this package's modern `useAzureMonitor` API
+// plus the OpenTelemetry trace API. Gated for regression.
+//
+// We deliberately acquire `@opentelemetry/api` from inside
+// `applicationinsights`'s module-resolution tree (via `createRequire`)
+// so that the Tracer we benchmark is registered against the SAME api
+// instance that `useAzureMonitor()` mutated. Otherwise — if npm happens
+// to install a second hoisted copy of `@opentelemetry/api` at the perf
+// harness level — we would measure a no-op proxy tracer.
+
+import { createRequire } from "node:module";
+import { PerfOptionDictionary, PerfTest } from "@azure-tools/test-perf";
+import { useAzureMonitor } from "applicationinsights";
+import dotenv from "dotenv";
+dotenv.config();
+
+type AzureMonitorSpanOptions = Record<string, unknown>;
+
+const harnessRequire = createRequire(import.meta.url);
+const aiEntry = harnessRequire.resolve("applicationinsights");
+const aiRequire = createRequire(aiEntry);
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const { trace } = aiRequire("@opentelemetry/api") as any;
+
+let initialized = false;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+let tracer: any;
+function ensureInit(): void {
+  if (initialized) return;
+  useAzureMonitor({
+    azureMonitorExporterOptions: {
+      connectionString:
+        process.env.APPLICATIONINSIGHTS_CONNECTION_STRING ||
+        "InstrumentationKey=00000000-0000-0000-0000-000000000000;IngestionEndpoint=https://localhost/",
+    },
+  });
+  tracer = trace.getTracer("perf-azure-monitor-span");
+  initialized = true;
+}
+
+export class AzureMonitorSpanTest extends PerfTest<AzureMonitorSpanOptions> {
+  public options: PerfOptionDictionary<AzureMonitorSpanOptions> = {};
+
+  constructor() {
+    super();
+    ensureInit();
+  }
+
+  async run(): Promise<void> {
+    const span = tracer.startSpan("perf-span", {
+      attributes: {
+        "db.system": "zsql",
+        "db.statement": "SELECT * FROM Customers",
+        "peer.service": "http://dbname",
+      },
+    });
+    span.end();
+  }
+}
diff --git a/test/performanceTests/test/index.spec.ts b/test/performanceTests/test/index.spec.ts
index 033e63975..e227b8539 100644
--- a/test/performanceTests/test/index.spec.ts
+++ b/test/performanceTests/test/index.spec.ts
@@ -4,60 +4,82 @@
 import { createPerfProgram } from "@azure-tools/test-perf";
 import { TrackDependencyTest } from "./trackDependency.spec.js";
 import { TrackTraceTest } from "./trackTrace.spec.js";
+import { AzureMonitorSpanTest } from "./azureMonitorSpan.spec.js";
+import { AzureMonitorLogTest } from "./azureMonitorLog.spec.js";
+import { OtelSpanTest } from "./otelSpan.spec.js";
+import { OtelLogTest } from "./otelLog.spec.js";
 import https from "https";
 import fs from "fs";
+import { format } from "util";
 
-const json = JSON.parse(fs.readFileSync('package.json', 'utf8'));
-let perfTestData: string = "";
+const json = JSON.parse(fs.readFileSync("package.json", "utf8"));
+let perfTestData = "";
 const originalConsole = console.log;
 
-console.log = function(message: string) {
-    perfTestData += message;
+// Preserve Node's default console.log formatting (multi-arg, non-string
+// values) so downstream regex parsing matches what would have been printed.
+console.log = function (...args: unknown[]): void {
+    perfTestData += format(...args) + "\n";
 };
 
-const perfProgram = createPerfProgram(TrackDependencyTest, TrackTraceTest);
+const perfProgram = createPerfProgram(
+    TrackDependencyTest,
+    TrackTraceTest,
+    AzureMonitorSpanTest,
+    AzureMonitorLogTest,
+    OtelSpanTest,
+    OtelLogTest,
+);
+
+const scenarioFromArgv =
+    process.argv.slice(2).find((a) => !a.startsWith("-")) || "unknown";
+
 perfProgram.run().then(() => {
     console.log = originalConsole;
+
+    // Re-emit captured stdout so it remains visible to the parent driver.
+    process.stdout.write(perfTestData);
+
+    // Only post telemetry when the Microsoft-internal CI secrets are present;
+    // local/CI-without-secrets runs simply re-emit captured output and exit.
+    const iKey = process.env.GENEVA_IKEY;
+    const apiKey = process.env.API_KEY;
+    if (!iKey || !apiKey) {
+        return;
+    }
+
+    // Match the LAST occurrence of ops/s (skips the warmup line).
+    const allMatches = [...perfTestData.matchAll(/(\d{1,3}(?:,\d{3})*(?:\.\d+)?)\s*ops\/s/g)];
+    if (allMatches.length === 0) {
+        console.error("Error: Could not find a performance value to report.");
+        return;
+    }
+    const lastMatch = allMatches[allMatches.length - 1];
+    const value = Number(lastMatch[1].replace(/,/g, ""));
+
     const time = new Date().toISOString();
     const name = "SDKPerfTest";
-    const iKey = process.env.GENEVA_IKEY;
-    let sku = "";
     const ver = "4.0";
-    const apiKey = process.env.API_KEY;
     const testName = "NodePerfTests";
     const unit = "ops/sec";
     const metric = "ops";
-    const sdkVersion = json.dependencies['applicationinsights'].replace(/^\^/, '');
-    let value = 0;
-    
-    if (perfTestData.includes("TrackDependencyTest")) {
-        sku = "TrackDependencyTest";
-    } else if (perfTestData.includes("TrackTraceTest")) {
-        sku = "TrackTraceTest";
-    }
-    
-    let regex = /(\d{1,3}(,\d{3})*) ops\/s/;
-    const match = perfTestData.match(regex);
-    console.log(`Match: ${match}`);
-    console.log(`perfTestData: `, perfTestData);
-    if (match) {
-        // Remove commas from the result
-        value = Number(match[1].replace(/,/g, ''));
-        console.log(`Value: ${value}`);
-        https.get(`https://browser.events.data.microsoft.com/OneCollector/1.0/t.js?qsp=true&name=%22${name}%22&time=%22${time}%22&ver=%22${ver}%22&iKey=%22${iKey}%22&apikey=${apiKey}&-testName=%22${testName}%22&-sku=%22${sku}%22&-version=%22${sdkVersion}%22&-unitOfMeasure=%22${unit}%22&-metric=%22${metric}%22&-value*6=${value}`, (res) => {
-            let data = '';
-            
-            res.on('data', (chunk) => {
-                data += chunk;
-            });
-            
-            res.on('end', () => {
-                console.log(data);
-            });
-        }).on('error', (err) => {
+    const sdkVersion = (json.dependencies?.applicationinsights || "0.0.0").replace(/^\^/, "");
+    const sku = scenarioFromArgv;
+
+    https
+        .get(
+            `https://browser.events.data.microsoft.com/OneCollector/1.0/t.js?qsp=true&name=%22${name}%22&time=%22${time}%22&ver=%22${ver}%22&iKey=%22${iKey}%22&apikey=${apiKey}&-testName=%22${testName}%22&-sku=%22${sku}%22&-version=%22${sdkVersion}%22&-unitOfMeasure=%22${unit}%22&-metric=%22${metric}%22&-value*6=${value}`,
+            (res) => {
+                let data = "";
+                res.on("data", (chunk) => {
+                    data += chunk;
+                });
+                res.on("end", () => {
+                    console.log(data);
+                });
+            },
+        )
+        .on("error", (err) => {
             console.error(err);
         });
-    } else {
-        console.error("Error: Could not find a performance value to report.");
-    }
-});
\ No newline at end of file
+});
diff --git a/test/performanceTests/test/otelLog.spec.ts b/test/performanceTests/test/otelLog.spec.ts
new file mode 100644
index 000000000..0cc97c38a
--- /dev/null
+++ b/test/performanceTests/test/otelLog.spec.ts
@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+// Reference scenario: log emission via plain upstream OpenTelemetry only.
+// Reported as informational baseline; not used for PR-gating regression checks.
+//
+// Uses the provider directly (no global LoggerProvider registration) so this
+// benchmark is unaffected by whether other scenarios in the same install share
+// or duplicate the @opentelemetry/api-logs module instance.
+
+import { PerfOptionDictionary, PerfTest } from "@azure-tools/test-perf";
+import type { Logger } from "@opentelemetry/api-logs";
+import {
+  LoggerProvider,
+  SimpleLogRecordProcessor,
+  InMemoryLogRecordExporter,
+} from "@opentelemetry/sdk-logs";
+
+type OtelLogOptions = Record<string, unknown>;
+
+let logger: Logger | undefined;
+function ensureProvider(): Logger {
+  if (logger) {
+    return logger;
+  }
+  const provider = new LoggerProvider({
+    processors: [new SimpleLogRecordProcessor(new InMemoryLogRecordExporter())],
+  });
+  logger = provider.getLogger("perf-otel-log");
+  return logger;
+}
+
+export class OtelLogTest extends PerfTest<OtelLogOptions> {
+  public options: PerfOptionDictionary<OtelLogOptions> = {};
+
+  constructor() {
+    super();
+    ensureProvider();
+  }
+
+  async run(): Promise<void> {
+    logger!.emit({ body: "trace message" });
+  }
+}
diff --git a/test/performanceTests/test/otelSpan.spec.ts b/test/performanceTests/test/otelSpan.spec.ts
new file mode 100644
index 000000000..ee664b068
--- /dev/null
+++ b/test/performanceTests/test/otelSpan.spec.ts
@@ -0,0 +1,51 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+// Reference scenario: span creation via plain upstream OpenTelemetry only.
+// Reported as informational baseline; not used for PR-gating regression checks.
+//
+// Uses the provider directly (no global TracerProvider registration) so this
+// benchmark is unaffected by whether other scenarios in the same install share
+// or duplicate the @opentelemetry/api module instance.
+
+import { PerfOptionDictionary, PerfTest } from "@azure-tools/test-perf";
+import type { Tracer } from "@opentelemetry/api";
+import {
+  BasicTracerProvider,
+  SimpleSpanProcessor,
+  InMemorySpanExporter,
+} from "@opentelemetry/sdk-trace-base";
+
+type OtelSpanOptions = Record<string, unknown>;
+
+let tracer: Tracer | undefined;
+function ensureProvider(): Tracer {
+  if (tracer) {
+    return tracer;
+  }
+  const provider = new BasicTracerProvider({
+    spanProcessors: [new SimpleSpanProcessor(new InMemorySpanExporter())],
+  });
+  tracer = provider.getTracer("perf-otel-span");
+  return tracer;
+}
+
+export class OtelSpanTest extends PerfTest<OtelSpanOptions> {
+  public options: PerfOptionDictionary<OtelSpanOptions> = {};
+
+  constructor() {
+    super();
+    ensureProvider();
+  }
+
+  async run(): Promise<void> {
+    const span = tracer!.startSpan("perf-span", {
+      attributes: {
+        "db.system": "zsql",
+        "db.statement": "SELECT * FROM Customers",
+        "peer.service": "http://dbname",
+      },
+    });
+    span.end();
+  }
+}