message: ProfileHelper: sleep after warmup.
diff: @@ -133,6 +133,7 @@ export async function measurePerformanceSync(name: string, repeats: number, test
  for (let i = 0; i < repeats / 2; i++) {
  test();
  }
  + await sleepPromised(2);
  // actual test
  const samples = new Array(repeats);
  @@ -193,6 +194,7 @@ export async function measureThroughputSync(name: string, testDuration: number,
  test();
  now = getCurrentTime();
  }
  + await sleepPromised(2);
  // actual test
  const samples: number[] = [];
  @@ -516,6 +518,12 @@ function loadBaseLineIfAvailable() {
  }
  }
  +function sleepPromised(time: number = 1): Promise<void> {
  + return new Promise(resolve => {
  + setTimeout(resolve, time);
  + });
  +}
  +
  /**
  * Report call.
  *
  