Function debugWithTimer

lib/internal/util/debuglog.js:358–520

* Debuglog with time fns and support for trace * @param {string} set * @param {(startTimer: TimerStart, endTimer: TimerEnd, logTimer: TimerLog) => void} cb * @returns {{startTimer: TimerStart, endTimer: TimerEnd, logTimer: TimerLog}}

(set, cb)

 * @returns {{startTimer: TimerStart, endTimer: TimerEnd, logTimer: TimerLog}}
 */
function debugWithTimer(set, cb) {
  set = StringPrototypeToUpperCase(set);

  if (tracesStores === undefined) {
    tracesStores = { __proto__: null };
  }

  /**
   * @type {LogImpl}
   */
  function logImpl(label, timeFormatted, args) {
    const pid = process.pid;
    const colors = { colors: lazyUtilColors().shouldColorize(process.stderr) };
    const coloredPID = inspect(pid, colors);

    if (args === undefined)
      process.stderr.write(format('%s %s %s: %s\n', set, coloredPID, label, timeFormatted));
    else
      process.stderr.write(
        format(
          '%s %s %s: %s\n',
          set,
          coloredPID,
          label,
          timeFormatted,
          ...new SafeArrayIterator(args),
        ),
      );
  }

  const traceCategory = `node,node.${StringPrototypeToLowerCase(set)}`;
  let traceCategoryBuffer;
  let debugLogCategoryEnabled = false;
  let timerFlags = kNone;

  function ensureTimerFlagsAreUpdated() {
    timerFlags &= ~kSkipTrace;

    if (traceCategoryBuffer[0] === 0) {
      timerFlags |= kSkipTrace;
    }
  }

  /**
   * @type {TimerStart}
   */
  function internalStartTimer(logLabel, traceLabel) {
    ensureTimerFlagsAreUpdated();

    if ((timerFlags & kShouldSkipAll) === kShouldSkipAll) {
      return;
    }

    time(
      tracesStores[set],
      traceCategory,
      'debuglog.time',
      timerFlags,