Function unstable_trace

docs/external/js/react.development.js:2936–2987

(name, timestamp, callback)

    return ++threadIDCounter;
  }
  function unstable_trace(name, timestamp, callback) {
    var threadID = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : DEFAULT_THREAD_ID;

    var interaction = {
      __count: 1,
      id: interactionIDCounter++,
      name: name,
      timestamp: timestamp
    };
    var prevInteractions = interactionsRef.current; // Traced interactions should stack/accumulate.
    // To do that, clone the current interactions.
    // The previous set will be restored upon completion.

    var interactions = new Set(prevInteractions);
    interactions.add(interaction);
    interactionsRef.current = interactions;
    var subscriber = subscriberRef.current;
    var returnValue;

    try {
      if (subscriber !== null) {
        subscriber.onInteractionTraced(interaction);
      }
    } finally {
      try {
        if (subscriber !== null) {
          subscriber.onWorkStarted(interactions, threadID);
        }
      } finally {
        try {
          returnValue = callback();
        } finally {
          interactionsRef.current = prevInteractions;

          try {
            if (subscriber !== null) {
              subscriber.onWorkStopped(interactions, threadID);
            }
          } finally {
            interaction.__count--; // If no async work was scheduled for this interaction,
            // Notify subscribers that it's completed.

            if (subscriber !== null && interaction.__count === 0) {
              subscriber.onInteractionScheduledWorkCompleted(interaction);
            }
          }
        }
      }
    }

    return returnValue;
  }
  function unstable_wrap(callback) {
    var threadID = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THREAD_ID;