data: A3 提效对比实验数据（23 样例 + 人工基线 + 插件实测，整体提速约 266 倍）

- data/efficiency-samples/ 23 个多语言样例 + data/manual-review-tool.html 人工审核工具
- tests/measure/measure-plugin-samples.mjs 四语言插件侧测量脚本
- tests/measure/compare-a3.mjs 聚合对比 + results（插件实测/人工基线/comparison）
- performance-comparison.md 填实基线对比与结论；README 效果总结由占位改为真实数据

data/efficiency-samples/js/sample-06.js

@@ -0,0 +1,39 @@
+// sample-6: coupon service module
+var config = { retries: 3 };
+
+function couponProcess(items) {
+  var total = 0;
+  for (var i = 0; i < items.length; i++) {
+    total += items[i].amount;
+  }
+  if (total == 0) {
+    return null;
+  }
+  return total;
+}
+
+function couponValidate(record) {
+  var shadowed = record.id;
+  function inner() {
+    var shadowed = record.alt;
+    return shadowed;
+  }
+  if (record.value === record.value) {
+    inner();
+  }
+  return shadowed;
+}
+
+function couponUnsafe(input) {
+  var unused = computeLegacy(input);
+  eval(input.expression);
+  debugger;
+}
+
+function computeLegacy(x) {
+  if (x.pending) {}
+  x.count = x.count;
+  return x;
+}
+
+module.exports = { couponProcess, couponValidate, couponUnsafe, config };