Method getFlatProfile

deps/v8/tools/profile.mjs:793–839

* Calculates a flat profile of callees starting from a node with * the specified label. If no name specified, starts from the root. * * @param {string} opt_label Starting node label.

(opt_label)

   * @param {string} opt_label Starting node label.
   */
  getFlatProfile(opt_label) {
    const counters = new CallTree();
    const rootLabel = opt_label || CallTree.ROOT_NODE_LABEL;
    const precs = {__proto__:null};
    precs[rootLabel] = 0;
    const root = counters.findOrAddChild(rootLabel);

    this.topDownTree_.computeTotalWeights();
    this.topDownTree_.traverseInDepth(
      function onEnter(node) {
        if (!(node.label in precs)) {
          precs[node.label] = 0;
        }
        const nodeLabelIsRootLabel = node.label == rootLabel;
        if (nodeLabelIsRootLabel || precs[rootLabel] > 0) {
          if (precs[rootLabel] == 0) {
            root.selfWeight += node.selfWeight;
            root.totalWeight += node.totalWeight;
          } else {
            const rec = root.findOrAddChild(node.label);
            rec.selfWeight += node.selfWeight;
            if (nodeLabelIsRootLabel || precs[node.label] == 0) {
              rec.totalWeight += node.totalWeight;
            }
          }
          precs[node.label]++;
        }
      },
      function onExit(node) {
        if (node.label == rootLabel || precs[rootLabel] > 0) {
          precs[node.label]--;
        }
      },
      null);

    if (!opt_label) {
      // If we have created a flat profile for the whole program, we don't
      // need an explicit root in it. Thus, replace the counters tree
      // root with the node corresponding to the whole program.
      counters.root_ = root;
    } else {
      // Propagate weights so percents can be calculated correctly.
      counters.getRoot().selfWeight = root.selfWeight;
      counters.getRoot().totalWeight = root.totalWeight;
    }
    return counters;
  }

  getCEntryProfile() {
    const result = [new CEntryNode("TOTAL", 0)];