benchmark: split timers benchmark and refactor

benchmark/timers/timers-breadth.js

@@ -0,0 +1,20 @@
+'use strict';
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {
+  thousands: [500],
+});
+
+function main(conf) {
+  var N = +conf.thousands * 1e3;
+  var n = 0;
+  bench.start();
+  function cb() {
+    n++;
+    if (n === N)
+      bench.end(N / 1e3);
+  }
+  for (var i = 0; i < N; i++) {
+    setTimeout(cb, 1);
+  }
+}

benchmark/timers/timers-depth.js

@@ -0,0 +1,20 @@
+'use strict';
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {
+  thousands: [1],
+});
+
+function main(conf) {
+  var N = +conf.thousands * 1e3;
+  var n = 0;
+  bench.start();
+  setTimeout(cb, 1);
+  function cb() {
+    n++;
+    if (n === N)
+      bench.end(N / 1e3);
+    else
+      setTimeout(cb, 1);
+  }
+}