Editing Underscore templates - classic vs. precompiled 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) Benchmarking difference in performance of rendering simple Underscore template - classic vs. precompiled 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 src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/1.0.0-rc.2/lodash.min.js"></script> <script> var lodash = _.noConflict(); </script> 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) var _ = window.lodash; var template = '<div class="item <%= id %>">' + ' <h1><%= title %></h1>' + ' <p><%= desc %></p>' + ' <ul class="attributes">' + ' <li><%= attrs.dimensions %></li>' + ' <li><%= attrs.weight %></li>' + ' <li><%= attrs.price %></li>' + ' </ul>' + '</div>'; var templateFuncPrecompiled = eval("(" + _.template(template).source + ")"); function temp(id,title,desc,dimensions,weight,price){ var template = '<div class="item'+id+'">\ <h1>'+title+'</h1>\ <p>'+desc+'</p>\ <ul class="attributes">\ <li>'+dimensions+'</li>\ <li>'+weight+'</li>\ <li>'+price+'</li>\ </ul>\ </div>'; return template ; } Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ) Code snippets to compare Test 1 Title Async (check if this is an asynchronous test) Code var templateFunc = _.template(template); // compile template var output = templateFunc({ // render template id: 5, title : 'Hello World!', desc : 'Ordianry item', attrs : { dimensions : '100cm x 100cm x 20cm', weight : '15kg', price : '10EUR' } }); Test 2 Title Async (check if this is an asynchronous test) Code var output = templateFuncPrecompiled({ // render template id: 5, title : 'Hello World!', desc : 'Ordianry item', attrs : { dimensions : '100cm x 100cm x 20cm', weight : '15kg', price : '10EUR' } }); Test 3 Title Async (check if this is an asynchronous test) Code temp(5,'Hello World!','Ordianry item', '100cm x 100cm x 20cm','15kg','10EUR');