[inspector] added simple js-perf-test for inspector

This test checks how much time we spent for generating Debugger.paused notification.

R=machenbach@chromium.org

Bug: chromium:688036
Change-Id: Ie8a52aafe6c8d93401b0b2a90a202ddff7de78ef
Reviewed-on: https://chromium-review.googlesource.com/538584
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46035}

test/js-perf-test/Inspector/debugger.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+new BenchmarkSuite('Debugger.paused', [10000], [
+  new Benchmark('Debugger.paused', false, false, 0, DebuggerPaused, DebuggerEnable, DebuggerDisable),
+]);
+
+let lastId = 0;
+function DebuggerEnable() {
+  send(JSON.stringify({id: ++lastId, method: 'Debugger.enable'}));
+  // force lazy compilation of inspector related scrtips
+  send(JSON.stringify({id: ++lastId, method: 'Runtime.evaluate', params: {expression: ''}}));
+}
+
+function DebuggerDisable() {
+  send(JSON.stringify({id: ++lastId, method: 'Debugger.disable'}));
+}
+
+function DebuggerPaused() {
+  for (var i = 0; i < 10; ++i) {
+    debugger;
+  }
+}

test/js-perf-test/Inspector/run.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+load('../base.js');
+
+load('debugger.js');
+
+var success = true;
+
+function PrintResult(name, result) {
+  print(name + '-Inspector(Score): ' + result);
+}
+
+function PrintStep(name) {}
+
+function PrintError(name, error) {
+  PrintResult(name, error);
+  success = false;
+}
+
+
+BenchmarkSuite.config.doWarmup = undefined;
+BenchmarkSuite.config.doDeterministic = undefined;
+
+BenchmarkSuite.RunSuites({ NotifyResult: PrintResult,
+                           NotifyError: PrintError,
+                           NotifyStep: PrintStep });

test/js-perf-test/JSTests.json

@@ -505,6 +505,17 @@
         {"name": "StringConcat"},
         {"name": "BitwiseOr"}
       ]
+    },
+    {
+      "name": "Inspector",
+      "path": ["Inspector"],
+      "main": "run.js",
+      "resources": [ "debugger.js" ],
+      "flags": ["--enable-inspector"],
+      "results_regexp": "^%s\\-Inspector\\(Score\\): (.+)$",
+      "tests": [
+        {"name": "Debugger.paused"}
+      ]
     }
   ]
 }