Editing JavaScript template language shootoff 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) A limited comparison of some popular JavaScript templating engines on a short template: ***6 header tags, and 10 list items***. Compared templating engines: - [Mustache](http://mustache.github.com/) - [jsRender](http://github.com/BorisMoore/jsrender) - [Kendo UI Templates](http://demos.kendoui.com/templates/index.html) - [Handlebar](http://www.handlebarsjs.com/) - [Resig Micro-Templating (modified)](http://ejohn.org/blog/javascript-micro-templating/) - [Underscore JS](http://documentcloud.github.com/underscore/) - [Lo-Dash](http://lodash.com) ##Understanding Kendo UI Template Performance## It's not magic. Through careful performance testing, we have found that string concatenation (+=) outside of a "with" block is significantly faster than JavaScript array push/join operations in a "with" block. This helps Kendo UI Templates run as fast as possible. Additional optimizations are coming soon to make performance in a "with" block better, too. [More on Kendo UI Templates](http://demos.kendoui.com/web/templates/index.html) *Note: When adding a new test, please ensure that your test returns the same HTML string (or equivalent DOM fragment) as the others.* 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="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js"></script> <script src="http://ajax.cdnjs.com/ajax/libs/mustache.js/0.3.0/mustache.min.js"></script> <script src="https://github.com/downloads/wycats/handlebars.js/handlebars.1.0.0.beta.3.js"></script> <script src="http://cdn.kendostatic.com/2012.1.322/js/kendo.all.min.js"></script> <script src="http://jashkenas.github.com/coffee-script/extras/coffee-script.js"></script> <script src="https://raw.github.com/BorisMoore/jsrender/master/jsrender.js"></script> <script src="http://dl.dropbox.com/u/513327/lodash_template.js"></script> <script> var lodash = _.noConflict(); </script> <!--External Template Definitions--> <script type="text/x-kendo-template" id="kendoUIextTemplate"> <div> <h1 class='header'>#= data.header #</h1> <h2 class='header2'>#= data.header2 #</h2> <h3 class='header3'>#= data.header3 #</h3> <h4 class='header4'>#= data.header4 #</h4> <h5 class='header5'>#= data.header5 #</h5> <h6 class='header6'>#= data.header6 #</h6> <ul class='list'> # for (var i = 0, l = data.list.length; i < l; i++) { # <li class='item'>#= data.list[i] #</li> # } # </ul> </div> </script> <script> window.sharedVariables = { header: "Header", header2: "Header2", header3: "Header3", header4: "Header4", header5: "Header5", header6: "Header6", list: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10'] }; //JsRender compiled template (no encoding) window.jsRenderTemplate = $.templates("<div><h1 class='header'>{{:header}}</h1><h2 class='header2'>{{:header2}}</h2><h3 class='header3'>{{:header3}}</h3><h4 class='header4'>{{:header4}}</h4><h5 class='header5'>{{:header5}}</h5><h6 class='header6'>{{:header6}}</h6><ul class='list'>{{for list}}<li class='item'>{{:$value}}</li>{{/for}}</ul></div>"); window.mustacheTemplate = "<div><h1 class='header'>{{{header}}}</h1><h2 class='header2'>{{{header2}}}</h2><h3 class='header3'>{{{header3}}}</h3><h4 class='header4'>{{{header4}}}</h4><h5 class='header5'>{{{header5}}}</h5><h6 class='header6'>{{{header6}}}</h6><ul class='list'>{{#list}}<li class='item'>{{{.}}}</li>{{/list}}</ul></div>"; window.handlebarsTemplate = Handlebars.compile("<div><h1 class='header'>{{header}}</h1><h2 class='header2'>{{header2}}</h2><h3 class='header3'>{{header3}}</h3><h4 class='header4'>{{header4}}</h4><h5 class='header5'>{{header5}}</h5><h6 class='header6'>{{header6}}</h6><ul class='list'>{{#each list}}<li class='item'>{{this}}</li>{{/each}}</ul></div>"); window.kendouiTemplate = kendo.template("<div><h1 class='header'>#= data.header #</h1><h2 class='header2'>#= data.header2 #</h2><h3 class='header3'>#= data.header3 #</h3><h4 class='header4'>#= data.header4 #</h4><h5 class='header5'>#= data.header5 #</h5><h6 class='header6'>#= data.header6 #</h6><ul class='list'># for (var i = 0, l = data.list.length; i < l; i++) { #<li class='item'>#= data.list[i] #</li># } #</ul></div>", {useWithBlock:true}); window.kendouiTemplate2 = kendo.template("<div><h1 class='header'>#= data.header #</h1><h2 class='header2'>#= data.header2 #</h2><h3 class='header3'>#= data.header3 #</h3><h4 class='header4'>#= data.header4 #</h4><h5 class='header5'>#= data.header5 #</h5><h6 class='header6'>#= data.header6 #</h6><ul class='list'># for (var i = 0, l = data.list.length; i < l; i++) { #<li class='item'>#= data.list[i] #</li># } #</ul></div>", {useWithBlock:false}); //Use external template definition window.kendoUIAlt = kendo.template($("#kendoUIextTemplate").html()); window.kendoUIAlt2 = kendo.template($("#kendoUIextTemplate").html(), {useWithBlock:false}); window.underscoreTemplate = _.template("<div><h1 class='header'><%= header %></h1><h2 class='header2'><%= header2 %></h2><h3 class='header3'><%= header3 %></h3><h4 class='header4'><%= header4 %></h4><h5 class='header5'><%= header5 %></h5><h6 class='header6'><%= header6 %></h6><ul class='list'><% for (var i = 0, l = list.length; i < l; i++) { %><li class='item'><%= list[i] %></li><% } %></ul></div>"); window.underscoreTemplateNoWith = _.template("<div><h1 class='header'><%= data.header %></h1><h2 class='header2'><%= data.header2 %></h2><h3 class='header3'><%= data.header3 %></h3><h4 class='header4'><%= data.header4 %></h4><h5 class='header5'><%= data.header5 %></h5><h6 class='header6'><%= data.header6 %></h6><ul class='list'><% for (var i = 0, l = data.list.length; i < l; i++) { %><li class='item'><%= data.list[i] %></li><% } %></ul></div>", null, {variable: 'data'}); window.lodashTemplate = lodash.template("<div><h1 class='header'><%= header %></h1><h2 class='header2'><%= header2 %></h2><h3 class='header3'><%= header3 %></h3><h4 class='header4'><%= header4 %></h4><h5 class='header5'><%= header5 %></h5><h6 class='header6'><%= header6 %></h6><ul class='list'><% for (var i = 0, l = list.length; i < l; i++) { %><li class='item'><%= list[i] %></li><% } %></ul></div>"); window.lodashTemplateNoWith = lodash.template("<div><h1 class='header'><%= data.header %></h1><h2 class='header2'><%= data.header2 %></h2><h3 class='header3'><%= data.header3 %></h3><h4 class='header4'><%= data.header4 %></h4><h5 class='header5'><%= data.header5 %></h5><h6 class='header6'><%= data.header6 %></h6><ul class='list'><% for (var i = 0, l = data.list.length; i < l; i++) { %><li class='item'><%= data.list[i] %></li><% } %></ul></div>", null, {variable: 'data'}); window.baseHtml = "<div><h1 class='header'></h1><h2 class='header2'></h2><h3 class='header3'></h3><h4 class='header4'></h4><h5 class='header5'></h5><h6 class='header6'></h6><ul class='list'><li class='item'></li></ul></div>"; //Resig Template Function (modified to support ') function tmpl(str) { var strFunc = "var p=[];" + "with(obj){p.push('" + str.replace(/[\r\t\n]/g, " ") .replace(/'(?=[^#]*#>)/g, "\t") .split("'").join("\\'") .split("\t").join("'") .replace(/<#=(.+?)#>/g, "',$1,'") .split("<#").join("');") .split("#>").join("p.push('") + "');}return p.join('');"; return new Function("obj", strFunc); } window.resig = tmpl("<div><h1 class='header'><#= header #></h1><h2 class='header2'><#= header2 #></h2><h3 class='header3'><#= header3 #></h3><h4 class='header4'><#= header4 #></h4><h5 class='header5'><#= header5 #></h5><h6 class='header6'><#= header6 #></h6><ul class='list'><# for (var i = 0, l = list.length; i < l; i++) { #><li class='item'><#= list[i] #></li><# } #></ul></div>"); //Resig modified template function (no "with" block) function tmpl2(str) { var strFunc = "var p=[];" + "p.push('" + str.replace(/[\r\t\n]/g, " ") .replace(/'(?=[^#]*#>)/g, "\t") .split("'").join("\\'") .split("\t").join("'") .replace(/<#=(.+?)#>/g, "',$1,'") .split("<#").join("');") .split("#>").join("p.push('") + "');return p.join('');"; return new Function("data", strFunc); } window.resig2 = tmpl2("<div><h1 class='header'><#= data.header #></h1><h2 class='header2'><#= data.header2 #></h2><h3 class='header3'><#= data.header3 #></h3><h4 class='header4'><#= data.header4 #></h4><h5 class='header5'><#= data.header5 #></h5><h6 class='header6'><#= data.header6 #></h6><ul class='list'><# for (var i = 0, l = data.list.length; i < l; i++) { #><li class='item'><#= data.list[i] #></li><# } #></ul></div>"); </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) 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 Mustache.to_html(mustacheTemplate, sharedVariables); Test 2 Title Async (check if this is an asynchronous test) Code jsRenderTemplate.render(sharedVariables); Test 3 Title Async (check if this is an asynchronous test) Code kendouiTemplate(sharedVariables); Test 4 Title Async (check if this is an asynchronous test) Code kendouiTemplate2(sharedVariables) Test 5 Title Async (check if this is an asynchronous test) Code kendoUIAlt(sharedVariables); Test 6 Title Async (check if this is an asynchronous test) Code kendoUIAlt2(sharedVariables); Test 7 Title Async (check if this is an asynchronous test) Code handlebarsTemplate(sharedVariables); Test 8 Title Async (check if this is an asynchronous test) Code underscoreTemplate(sharedVariables); Test 9 Title Async (check if this is an asynchronous test) Code resig(sharedVariables) Test 10 Title Async (check if this is an asynchronous test) Code resig2(sharedVariables) Test 11 Title Async (check if this is an asynchronous test) Code underscoreTemplateNoWith(sharedVariables) Test 12 Title Async (check if this is an asynchronous test) Code lodashTemplate(sharedVariables); Test 13 Title Async (check if this is an asynchronous test) Code lodashTemplateNoWith(sharedVariables)