Add benchmark for inserting and deleting a character

benchmark/benchmark-helper.coffee

@@ -7,20 +7,32 @@ Point = require 'point'
 require 'window'
 window.showConsole()
 
-beforeEach ->
-  window.keymap = new Keymap
-
-afterEach ->
-  $('#jasmine-content').empty()
-
 keymap = new Keymap
 keymap.bindDefaultKeys()
 $(window).on 'keydown', (e) -> keymap.handleKeyEvent(e)
 keymap.bindKeys '*', 'meta-w': 'close'
 $(document).on 'close', -> window.close()
 
-window.benchmark = (description, fn) ->
-  it description, fn
+window.profile = (description, fn) ->
+  window.benchmark(description, fn, true)
+
+window.benchmark = (description, fn, profile=false) ->
+  it description, ->
+    count = 50
+    total = measure ->
+      console.profile(description) if profile
+      _.times count, fn
+      console.profileEnd(description) if profile
+    avg = total / count
+    report = "#{description}: #{total} / #{count} = #{avg}ms"
+
+    console.log report
+    throw new Error(report)
+
+window.measure = (fn) ->
+  start = new Date().getTime()
+  fn()
+  new Date().getTime() - start
 
 window.waitsForPromise = (fn) ->
   window.waitsFor (moveOn) ->

benchmark/benchmark-suite.coffee

@@ -2,6 +2,17 @@ fs = require 'fs'
 require 'benchmark-helper'
 
 describe "Editor", ->
-  benchmark "inserting and deleting a character", ->
+  editor = null
 
+  beforeEach ->
+    window.rootViewParentSelector = '#jasmine-content'
+    window.startup()
+    editor = rootView.editor
+
+  afterEach ->
+    window.shutdown()
+
+  profile "inserting and deleting a character", ->
+    editor.hiddenInput.textInput('x')
+    editor.backspace()
 

src/atom/window.coffee

@@ -11,6 +11,7 @@ require 'jquery-extensions'
 # the DOM window.
 
 windowAdditions =
+  rootViewParentSelector: 'body'
   rootView: null
   keymap: null
 
@@ -45,7 +46,7 @@ windowAdditions =
 
   attachRootView: (url) ->
     @rootView = new RootView {url}
-    $('body').append @rootView
+    $(@rootViewParentSelector).append @rootView
 
   requireStylesheet: (path) ->
     fullPath = require.resolve(path)