JavaScript template language shootoff

JavaScript performance comparison

Revision 390 of this test case created by Brad Dunbar

Info

A limited comparison of some popular JavaScript templating engines on a short template: 6 header tags, and 10 list items. Compared templating engines:

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

Note: When adding a new test, please ensure that your test returns the same HTML string (or equivalent DOM fragment) as the others.

Preparation code

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<script src="https://raw.github.com/documentcloud/underscore/master/underscore.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>

<!--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.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>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
Mustache.js Template
Mustache.to_html(mustacheTemplate, sharedVariables);
pending…
JsRender
jsRenderTemplate.render(sharedVariables);
pending…
Kendo UI Templates (Default)
kendouiTemplate(sharedVariables);
pending…
Kendo UI Templates (No "with" block)
kendouiTemplate2(sharedVariables)
pending…
Kendo UI Templates (External Temp Def)
kendoUIAlt(sharedVariables);
pending…
Kendo UI Templates (External Temp Def - No "with" block))
kendoUIAlt2(sharedVariables);
pending…
Handlebars.js
handlebarsTemplate(sharedVariables);
pending…
Underscore.js Template
underscoreTemplate(sharedVariables);
pending…
Resig Micro Templates (modified)
resig(sharedVariables)
pending…
Resig Micro Templates (No "with" block)
resig2(sharedVariables)
pending…
Underscore.js Template (No "with")
underscoreTemplateNoWith(sharedVariables)
pending…

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