100 lines
2.4 KiB
JavaScript
100 lines
2.4 KiB
JavaScript
//
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// ember-renderspeed
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//
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// Include this script if you want to instrument your rendering speed in your Ember
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// applications.
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//
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// https://github.com/eviltrout/ember-renderspeed
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//
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if ((typeof console !== 'undefined') && console.groupCollapsed && !window.QUnit) {
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(function () {
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/**
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Used for assembling a tree of render calls so they can be grouped and displayed
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nicely afterwards.
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@class ProfileNode
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**/
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var ProfileNode = function(start, payload) {
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this.start = start;
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this.payload = payload;
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this.children = [];
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};
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/**
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Adds a child node underneath this node.
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@method addChild
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@param {ProfileNode} node the node we want as a child
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**/
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ProfileNode.prototype.addChild = function(node) {
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this.children.push(node);
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};
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/**
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Logs this node and any children to the developer console, grouping appropriately
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for easy drilling down.
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@method log
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**/
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ProfileNode.prototype.log = function(type) {
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var description = "";
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if (this.payload) {
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if (this.payload.template) {
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description += "'" + this.payload.template + "' ";
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}
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if (this.payload.object) {
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description += this.payload.object.toString() + " ";
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}
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}
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description += (Math.round(this.time * 100) / 100).toString() + "ms";
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if (this.children.length === 0) {
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console.log(type + ": " + description);
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} else {
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// render a collapsed group when there are children
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console.groupCollapsed(type + ": " + description);
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this.children.forEach(function (c) {
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c.log(type);
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});
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console.groupEnd();
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}
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};
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// Set up our instrumentation of Ember below
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Ember.subscribe("render", {
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depth: null,
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before: function(name, timestamp, payload) {
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var node = new ProfileNode(timestamp, payload);
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if (this.depth) { node.parent = this.depth; }
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this.depth = node;
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return node;
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},
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after: function(name, timestamp, payload, profileNode) {
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if (payload.exception) {
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throw payload.exception;
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}
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profileNode.time = (timestamp - profileNode.start);
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this.depth = profileNode.parent;
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if (profileNode.time < 1) { return; }
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if (this.depth) {
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this.depth.addChild(profileNode);
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} else {
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profileNode.log("Render");
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}
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}
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});
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})();
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}
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