benchmark: add more thorough timers benchmarks

Refs: https://github.com/nodejs/node/issues/9493
PR-URL: https://github.com/nodejs/node/pull/10925
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

benchmark/timers/timers-cancel-pooled.js

@@ -0,0 +1,32 @@
+'use strict';
+var common = require('../common.js');
+var assert = require('assert');
+
+var bench = common.createBenchmark(main, {
+  thousands: [500],
+});
+
+function main(conf) {
+  var iterations = +conf.thousands * 1e3;
+
+  var timer = setTimeout(() => {}, 1);
+  for (var i = 0; i < iterations; i++) {
+    setTimeout(cb, 1);
+  }
+  var next = timer._idlePrev;
+  clearTimeout(timer);
+
+  bench.start();
+
+  for (var j = 0; j < iterations; j++) {
+    timer = next;
+    next = timer._idlePrev;
+    clearTimeout(timer);
+  }
+
+  bench.end(iterations / 1e3);
+}
+
+function cb() {
+  assert(false, 'Timer should not call callback');
+}

benchmark/timers/timers-cancel-unpooled.js

@@ -0,0 +1,26 @@
+'use strict';
+var common = require('../common.js');
+var assert = require('assert');
+
+var bench = common.createBenchmark(main, {
+  thousands: [100],
+});
+
+function main(conf) {
+  var iterations = +conf.thousands * 1e3;
+
+  var timersList = [];
+  for (var i = 0; i < iterations; i++) {
+    timersList.push(setTimeout(cb, i + 1));
+  }
+
+  bench.start();
+  for (var j = 0; j < iterations + 1; j++) {
+    clearTimeout(timersList[j]);
+  }
+  bench.end(iterations / 1e3);
+}
+
+function cb() {
+  assert(false, 'Timer ' + this._idleTimeout + ' should not call callback');
+}

benchmark/timers/timers-insert-pooled.js

@@ -0,0 +1,18 @@
+'use strict';
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {
+  thousands: [500],
+});
+
+function main(conf) {
+  var iterations = +conf.thousands * 1e3;
+
+  bench.start();
+
+  for (var i = 0; i < iterations; i++) {
+    setTimeout(() => {}, 1);
+  }
+
+  bench.end(iterations / 1e3);
+}

benchmark/timers/timers-insert-unpooled.js

@@ -0,0 +1,27 @@
+'use strict';
+var common = require('../common.js');
+var assert = require('assert');
+
+var bench = common.createBenchmark(main, {
+  thousands: [100],
+});
+
+function main(conf) {
+  var iterations = +conf.thousands * 1e3;
+
+  var timersList = [];
+
+  bench.start();
+  for (var i = 0; i < iterations; i++) {
+    timersList.push(setTimeout(cb, i + 1));
+  }
+  bench.end(iterations / 1e3);
+
+  for (var j = 0; j < iterations + 1; j++) {
+    clearTimeout(timersList[j]);
+  }
+}
+
+function cb() {
+  assert(false, 'Timer ' + this._idleTimeout + ' should not call callback');
+}

benchmark/timers/timers-timeout-pooled.js

@@ -0,0 +1,23 @@
+'use strict';
+var common = require('../common.js');
+
+var bench = common.createBenchmark(main, {
+  thousands: [500],
+});
+
+function main(conf) {
+  var iterations = +conf.thousands * 1e3;
+  var count = 0;
+
+  for (var i = 0; i < iterations; i++) {
+    setTimeout(cb, 1);
+  }
+
+  bench.start();
+
+  function cb() {
+    count++;
+    if (count === iterations)
+      bench.end(iterations / 1e3);
+  }
+}