feat: dump node process information when running

packages/core/src/index.ts

@@ -58,6 +58,14 @@ export const setupCore = () => {
   native_core.InstrumentHooks.setIntegration("codspeed-node", __VERSION__);
   linuxPerf.start();
   checkV8Flags();
+
+  // Collect Node.js runtime environment to detect changes that could
+  // cause performance differences across runs
+  const hooks = native_core.InstrumentHooks;
+  hooks.setEnvironment("Node.js", "version", process.versions.node);
+  hooks.setEnvironment("Node.js", "v8", process.versions.v8);
+  hooks.setEnvironment("Node.js", "arch", process.arch);
+  hooks.writeEnvironment(process.pid);
 };
 
 export const teardownCore = () => {

packages/core/src/native_core/index.ts

@@ -51,6 +51,14 @@ try {
       setIntegration: (_name: string, _version: string) => {
         return 0;
       },
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      setEnvironment: (_sectionName: string, _key: string, _value: string) => {
+        return 0;
+      },
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      writeEnvironment: (_pid: number) => {
+        return 0;
+      },
       __codspeed_root_frame__: <T>(callback: () => T): T => {
         return callback();
       },

packages/core/src/native_core/instruments/hooks.ts

@@ -32,6 +32,22 @@ export interface InstrumentHooks {
    */
   setIntegration(name: string, version: string): number;
 
+  /**
+   * Register a key-value pair under a named environment section.
+   * @param sectionName Section name (e.g. "Node.js")
+   * @param key Key name (e.g. "version")
+   * @param value Value (e.g. "22.0.0")
+   * @returns 0 on success, non-zero on error
+   */
+  setEnvironment(sectionName: string, key: string, value: string): number;
+
+  /**
+   * Flush all registered environment sections to disk.
+   * @param pid Process ID
+   * @returns 0 on success, non-zero on error
+   */
+  writeEnvironment(pid: number): number;
+
   /**
    * Execute a callback function with __codspeed_root_frame__ in its stack trace
    * @param callback Function to execute

packages/core/src/native_core/instruments/hooks_wrapper.cc

@@ -81,6 +81,54 @@ Napi::Number SetIntegration(const Napi::CallbackInfo &info) {
   return Napi::Number::New(env, result);
 }
 
+Napi::Number SetEnvironment(const Napi::CallbackInfo &info) {
+  Napi::Env env = info.Env();
+
+  if (info.Length() != 3) {
+    Napi::TypeError::New(
+        env, "Expected 3 arguments: sectionName, key, and value")
+        .ThrowAsJavaScriptException();
+    return Napi::Number::New(env, 1);
+  }
+
+  if (!info[0].IsString() || !info[1].IsString() || !info[2].IsString()) {
+    Napi::TypeError::New(
+        env,
+        "Expected string (sectionName), string (key), and string (value)")
+        .ThrowAsJavaScriptException();
+    return Napi::Number::New(env, 1);
+  }
+
+  std::string section_name = info[0].As<Napi::String>().Utf8Value();
+  std::string key = info[1].As<Napi::String>().Utf8Value();
+  std::string value = info[2].As<Napi::String>().Utf8Value();
+
+  uint8_t result = instrument_hooks_set_environment(
+      hooks, section_name.c_str(), key.c_str(), value.c_str());
+  return Napi::Number::New(env, result);
+}
+
+Napi::Number WriteEnvironment(const Napi::CallbackInfo &info) {
+  Napi::Env env = info.Env();
+
+  if (info.Length() != 1) {
+    Napi::TypeError::New(env, "Expected 1 argument: pid")
+        .ThrowAsJavaScriptException();
+    return Napi::Number::New(env, 1);
+  }
+
+  if (!info[0].IsNumber()) {
+    Napi::TypeError::New(env, "Expected number (pid)")
+        .ThrowAsJavaScriptException();
+    return Napi::Number::New(env, 1);
+  }
+
+  uint32_t pid = info[0].As<Napi::Number>().Uint32Value();
+
+  uint8_t result = instrument_hooks_write_environment(hooks, pid);
+  return Napi::Number::New(env, result);
+}
+
 Napi::Value __attribute__ ((noinline)) __codspeed_root_frame__(const Napi::CallbackInfo &info) {
   Napi::Env env = info.Env();
 
@@ -117,6 +165,10 @@ Napi::Object Initialize(Napi::Env env, Napi::Object exports) {
                          Napi::Function::New(env, SetExecutedBenchmark));
   instrumentHooksObj.Set(Napi::String::New(env, "setIntegration"),
                          Napi::Function::New(env, SetIntegration));
+  instrumentHooksObj.Set(Napi::String::New(env, "setEnvironment"),
+                         Napi::Function::New(env, SetEnvironment));
+  instrumentHooksObj.Set(Napi::String::New(env, "writeEnvironment"),
+                         Napi::Function::New(env, WriteEnvironment));
   instrumentHooksObj.Set(Napi::String::New(env, "__codspeed_root_frame__"),
                          Napi::Function::New(env, __codspeed_root_frame__));
 

packages/core/src/native_core/instruments/hooks_wrapper.h

@@ -17,6 +17,8 @@ Napi::Number StartBenchmark(const Napi::CallbackInfo &info);
 Napi::Number StopBenchmark(const Napi::CallbackInfo &info);
 Napi::Number SetExecutedBenchmark(const Napi::CallbackInfo &info);
 Napi::Number SetIntegration(const Napi::CallbackInfo &info);
+Napi::Number SetEnvironment(const Napi::CallbackInfo &info);
+Napi::Number WriteEnvironment(const Napi::CallbackInfo &info);
 Napi::Object Initialize(Napi::Env env, Napi::Object exports);
 
 } // namespace hooks_wrapper