docs(readme): add benchmark section

Author: RomainLanz

README.md

@@ -212,3 +212,27 @@ Jobs must:
 - Have a static `jobName` property
 - Implement the `execute` method
 - Be exported as default
+
+## Benchmarks
+
+Performance comparison with BullMQ measuring pure dequeue overhead (jobs are no-ops). Results are averaged over 3 runs:
+
+| Jobs | Concurrency | @boringnode/queue | BullMQ | Diff         |
+|------|-------------|-------------------|--------|--------------|
+| 100  | 1           | 15ms              | 23ms   | 34.8% faster |
+| 100  | 5           | 24ms              | 18ms   | 33.3% slower |
+| 100  | 10          | 16ms              | 17ms   | ~same        |
+| 1000 | 1           | 171ms             | 135ms  | 26.7% slower |
+| 1000 | 5           | 106ms             | 55ms   | 92.7% slower |
+| 1000 | 10          | 88ms              | 57ms   | 54.4% slower |
+| 5000 | 1           | 495ms             | 615ms  | 19.5% faster |
+| 5000 | 5           | 342ms             | 253ms  | 35.2% slower |
+| 5000 | 10          | 456ms             | 234ms  | 94.9% slower |
+
+These numbers represent queue overhead only. With real job execution, the difference becomes negligible.
+
+Run benchmarks yourself:
+
+```bash
+npm run benchmark
+```