first test

node_modules/playwright-core/lib/bootstrap.js

@@ -0,0 +1,77 @@
+"use strict";
+if (process.env.PW_INSTRUMENT_MODULES) {
+  const Module = require("module");
+  const originalLoad = Module._load;
+  const root = { name: "<root>", selfMs: 0, totalMs: 0, childrenMs: 0, children: [] };
+  let current = root;
+  const stack = [];
+  Module._load = function(request, _parent, _isMain) {
+    const node = { name: request, selfMs: 0, totalMs: 0, childrenMs: 0, children: [] };
+    current.children.push(node);
+    stack.push(current);
+    current = node;
+    const start = performance.now();
+    let result;
+    try {
+      result = originalLoad.apply(this, arguments);
+    } catch (e) {
+      current = stack.pop();
+      current.children.pop();
+      throw e;
+    }
+    const duration = performance.now() - start;
+    node.totalMs = duration;
+    node.selfMs = Math.max(0, duration - node.childrenMs);
+    current = stack.pop();
+    current.childrenMs += duration;
+    return result;
+  };
+  process.on("exit", () => {
+    function printTree(node, prefix, isLast, lines2, depth) {
+      if (node.totalMs < 1 && depth > 0)
+        return;
+      const connector = depth === 0 ? "" : isLast ? "\u2514\u2500\u2500 " : "\u251C\u2500\u2500 ";
+      const time = `${node.totalMs.toFixed(1).padStart(8)}ms`;
+      const self = node.children.length ? ` (self: ${node.selfMs.toFixed(1)}ms)` : "";
+      lines2.push(`${time}  ${prefix}${connector}${node.name}${self}`);
+      const childPrefix = prefix + (depth === 0 ? "" : isLast ? "    " : "\u2502   ");
+      const sorted2 = node.children.slice().sort((a, b) => b.totalMs - a.totalMs);
+      for (let i = 0; i < sorted2.length; i++)
+        printTree(sorted2[i], childPrefix, i === sorted2.length - 1, lines2, depth + 1);
+    }
+    let totalModules = 0;
+    function count(n) {
+      totalModules++;
+      n.children.forEach(count);
+    }
+    root.children.forEach(count);
+    const lines = [];
+    const sorted = root.children.slice().sort((a, b) => b.totalMs - a.totalMs);
+    for (let i = 0; i < sorted.length; i++)
+      printTree(sorted[i], "", i === sorted.length - 1, lines, 0);
+    const totalMs = root.children.reduce((s, c) => s + c.totalMs, 0);
+    process.stderr.write(`
+--- Module load tree: ${totalModules} modules, ${totalMs.toFixed(0)}ms total ---
+` + lines.join("\n") + "\n");
+    const flat = /* @__PURE__ */ new Map();
+    function gather(n) {
+      const existing = flat.get(n.name);
+      if (existing) {
+        existing.selfMs += n.selfMs;
+        existing.totalMs += n.totalMs;
+        existing.count++;
+      } else {
+        flat.set(n.name, { selfMs: n.selfMs, totalMs: n.totalMs, count: 1 });
+      }
+      n.children.forEach(gather);
+    }
+    root.children.forEach(gather);
+    const top50 = [...flat.entries()].sort((a, b) => b[1].selfMs - a[1].selfMs).slice(0, 50);
+    const flatLines = top50.map(
+      ([mod, { selfMs, totalMs: totalMs2, count: count2 }]) => `${selfMs.toFixed(1).padStart(8)}ms self ${totalMs2.toFixed(1).padStart(8)}ms total  (x${String(count2).padStart(3)})  ${mod}`
+    );
+    process.stderr.write(`
+--- Top 50 modules by self time ---
+` + flatLines.join("\n") + "\n");
+  });
+}