Configurable

Author: trask

.github/workflows/benchmark.yml

@@ -43,10 +43,21 @@ jobs:
       - name: Run jmh
         run: ./gradlew jmhJar
 
+      - name: Check which benchmarks to run
+        id: benchmarks
+        run: |
+          DEFAULT="SpanBenchmark SpanPipelineBenchmark ExporterBenchmark"
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            BENCHMARKS=$(echo "${{ github.event.pull_request.body }}" | grep "Benchmarks:" | sed 's/^\s*Benchmarks:\s*//' | head -1 | xargs)
+            echo "list=${BENCHMARKS:-$DEFAULT}" >> $GITHUB_OUTPUT
+          else
+            echo "list=$DEFAULT" >> $GITHUB_OUTPUT
+          fi
+
       - name: Run Benchmark
         run: |
           cd sdk/trace/build
-          java -jar libs/opentelemetry-sdk-trace-*-jmh.jar -rf json SpanBenchmark SpanPipelineBenchmark ExporterBenchmark
+          java -jar libs/opentelemetry-sdk-trace-*-jmh.jar -rf json ${{ steps.benchmarks.outputs.list }}
 
       - name: Use CLA approved github bot
         if: github.event_name != 'pull_request'