Function collectFunctions

Lib/profiling/sampling/_flamegraph_assets/flamegraph.js:1045–1098

(node)

  const functionMap = new Map();

  function collectFunctions(node) {
    if (!node) return;

    let filename = resolveString(node.filename);
    let funcname = resolveString(node.funcname);

    if (!filename || !funcname) {
      const nameStr = resolveString(node.name);
      if (nameStr?.includes('(')) {
        const match = nameStr.match(/^(.+?)\s*\((.+?):(\d+)\)$/);
        if (match) {
          funcname = funcname || match[1];
          filename = filename || match[2];
        }
      }
    }

    filename = filename || 'unknown';
    funcname = funcname || 'unknown';

    if (filename !== 'unknown' && funcname !== 'unknown' && node.value > 0) {
      let childrenValue = 0;
      if (node.children) {
        childrenValue = node.children.reduce((sum, child) => sum + child.value, 0);
      }
      const directSamples = Math.max(0, node.value - childrenValue);

      const funcKey = `${filename}:${node.lineno || '?'}:${funcname}`;

      if (functionMap.has(funcKey)) {
        const existing = functionMap.get(funcKey);
        existing.directSamples += directSamples;
        existing.directPercent = (existing.directSamples / totalSamples) * 100;
        if (directSamples > existing.maxSingleSamples) {
          existing.filename = filename;
          existing.lineno = node.lineno || '?';
          existing.maxSingleSamples = directSamples;
        }
      } else {
        functionMap.set(funcKey, {
          filename: filename,
          lineno: node.lineno || '?',
          funcname: funcname,
          directSamples,
          directPercent: (directSamples / totalSamples) * 100,
          maxSingleSamples: directSamples
        });
      }
    }

    if (node.children) {
      node.children.forEach(child => collectFunctions(child));
    }
  }

  collectFunctions(hotspotSource);