See #17798
return 0;
    }
    const existingID = pendingStringTable.get(str);
    if (existingID !== undefined) {
      return existingID;
    }
    const stringID = pendingStringTable.size + 1;
    pendingStringTable.set(str, stringID);
     T
     b
     t
    pendingStringTableLength += str.length + 1;
    return stringID;
  }
  function recordMount(fiber: Fiber, parentFiber: Fiber | null) {
    const isRoot = fiber.tag === HostRoot;
    const id = getFiberID(getPrimaryFiber(fiber));
    const hasOwnerMetadata = fiber.hasOwnProperty('_debugOwner');
    const isProfilingSupported = fiber.hasOwnProperty('treeBaseDuration');
    if (isRoot) {
      pushOperation(TREE_OPERATION_ADD);
      pushOperation(id);