Function markAndClear

packages/react-devtools-shared/src/backend/profilingHooks.js:214–218

(markName: string)

  }

  function markAndClear(markName: string) {
    // This method won't be called unless these functions are defined, so we can skip the extra typeof check.
    ((performanceTarget: any): Performance).mark(markName);
    ((performanceTarget: any): Performance).clearMarks(markName);
  }

  function recordReactMeasureStarted(
    type: ReactMeasureType,