feat: 拆分 stress benchmark 到细粒度单热点测试并修复 bench 采样逻辑

tests/stress/call_args.js

@@ -0,0 +1,10 @@
+var ITERATIONS = 20000;
+
+function add(a, b, c, d) {
+  return a + b + c + d;
+}
+var sum = 0;
+for (var i = 0; i < ITERATIONS; i++) {
+  sum += add(i, i + 1, i + 2, i + 3);
+}
+sum