chore(tinybench): emit benchmark markers

Author: not-matthias

packages/tinybench-plugin/src/shared.ts

@@ -1,4 +1,11 @@
-import { InstrumentHooks, setupCore, teardownCore } from "@codspeed/core";
+import {
+  getInstrumentMode,
+  InstrumentHooks,
+  MARKER_TYPE_BENCHMARK_END,
+  MARKER_TYPE_BENCHMARK_START,
+  setupCore,
+  teardownCore,
+} from "@codspeed/core";
 import { Bench, Fn, Task } from "tinybench";
 import { getTaskUri } from "./uri";
 
@@ -63,25 +70,43 @@ export abstract class BaseBenchRunner {
   protected abstract finalizeAsyncRun(): Task[];
   protected abstract finalizeSyncRun(): Task[];
 
+  private sendRunMarkers(runStart: bigint, runEnd: bigint): void {
+    if (getInstrumentMode() !== "walltime") {
+      return;
+    }
+    InstrumentHooks.addMarker(
+      process.pid,
+      MARKER_TYPE_BENCHMARK_START,
+      runStart,
+    );
+    InstrumentHooks.addMarker(process.pid, MARKER_TYPE_BENCHMARK_END, runEnd);
+  }
+
   public setupBenchMethods(): void {
     this.bench.run = async () => {
       this.setupBenchRun();
 
+      const runStart = InstrumentHooks.currentTimestamp();
       for (const task of this.bench.tasks) {
         const uri = this.getTaskUri(task);
         await this.runTaskAsync(task, uri);
       }
+      const runEnd = InstrumentHooks.currentTimestamp();
+      this.sendRunMarkers(runStart, runEnd);
 
       return this.finalizeAsyncRun();
     };
 
     this.bench.runSync = () => {
       this.setupBenchRun();
 
+      const runStart = InstrumentHooks.currentTimestamp();
       for (const task of this.bench.tasks) {
         const uri = this.getTaskUri(task);
         this.runTaskSync(task, uri);
       }
+      const runEnd = InstrumentHooks.currentTimestamp();
+      this.sendRunMarkers(runStart, runEnd);
 
       return this.finalizeSyncRun();
     };

packages/tinybench-plugin/tests/index.integ.test.ts

@@ -16,6 +16,8 @@ const mockCore = vi.hoisted(() => {
       startBenchmark: vi.fn(),
       stopBenchmark: vi.fn(),
       setExecutedBenchmark: vi.fn(),
+      currentTimestamp: vi.fn().mockReturnValue(0n),
+      addMarker: vi.fn(),
     },
     optimizeFunction: vi
       .fn()