Function timed

scripts/experimental/swiftui-preview.mjs:236–241

(label, action)

  const started = Date.now();
  const timings = [];
  const timed = (label, action) => {
    const stageStarted = Date.now();
    const result = action();
    timings.push([label, Date.now() - stageStarted]);
    return result;
  };
  const timedAsync = async (label, action) => {
    const stageStarted = Date.now();
    const result = await action();