lazy.js

  function lazyCompileFactory(id, html) {
    crunch.global.templates[id] = function(context) {
      var compiled = Handlebars.compile(html);
      crunch.global.templates[id] = compiled;
      return compiled(context);
    }
  }

  $('script[type="text/x-handlebars-template"]').each(function() {
    var text = this.textContent;
    if (!text) { text = this.innerHTML; } // IE 8

    lazyCompileFactory(this.id, text);
  });

mustachio.coffee

class Mustachio extends Backbone.View
  render: (template_id, context) ->
    @templates[template_id].call @, context

Mustachio.prepare = ->
  templates = {}

  raw_templates = $('script[type="text/x-handlebars-template"]')
  raw_templates.each (i, template) ->
    $template = $(template)
    templates[$template.attr('id')] = Handlebars.compile($template.html())

  Mustachio::templates = templates

window.Mustachio = Mustachio

$ ->
  Mustachio.prepare()