Editing Render Template From DOM Select vs Cache This edit will create a new revision. Your details (optional) Name Email (won’t be displayed; might be used for Gravatar) URL Test case details Title * Published (uncheck if you want to fiddle around before making the page public) Description (in case you feel further explanation is needed)(Markdown syntax is allowed) This test was spawned by some discussion in a StackOverflow thread: http://stackoverflow.com/questions/9833312/how-do-i-properly-store-a-javascript-template-so-that-it-isnt-instantiated-mul The purpose is to test the speed of rendering an underscore.js template when selecting the template from the DOM every time, vs selecting it once and re-rendering the cached template every time. Are you a spammer? (just answer the question) Preparation code Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries) <script id="test-template" type="text/template"> <p> this is <div class="foo">some html</div> </p> <ul> <li>with data <li>and items <li>etc </ul> </script> <script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <script src="//documentcloud.github.com/underscore/underscore-min.js"></script> <div id="html-output-goes-here"></div> Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script> Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ) this.cachedItem = $("#test-template"); this.cachedTemplate = _.template(this.cachedItem.html()); this.output = $("#html-output-goes-here"); Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ) delete this.cachedItem; delete this.cachedTemplate; Code snippets to compare Test 1 Title Async (check if this is an asynchronous test) Code var html = this.cachedTemplate(); this.output.html(html); console.log('a'); Test 2 Title Async (check if this is an asynchronous test) Code var uncachedItem = $("#test-template"); var uncachedTemplate = _.template(uncachedItem.html()); var html = uncachedTemplate(); this.output.html(html); console.log('b');