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@vsviridov /AngularTimings.js
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This is some assorted code to add support for Chrome Canary timline API to track angular timings. It also outputs some timings to the console.
(function(console)
{
"use strict";
var nop = function() {};
var ops = ["log", "info", "error", "warn", "time", "timeEnd", "group", "groupEnd", "timeline", "timelineEnd", "timeStamp"];
for(var x = 0; x < ops.length; x++)
{
if(!console[ops[x]]) { console[ops[x]] = nop; }
}
}(window.console = window.console || { $replaced: true }));
(function()
{
"use strict";
window.pageLoad = new Date().getTime();
window.lastLog = new Date().getTime();
console.$log = function $log()
{
try
{
if(typeof(arguments[0]) === "string")
{
var message = "(@%d +%d) " + arguments[0];
var newArgs = [];
newArgs.push(message, new Date().getTime() - window.pageLoad, new Date().getTime() - window.lastLog);
for(var i = 1; i < arguments.length; i++)
{
newArgs.push(arguments[i]);
}
return console.log.apply(console, newArgs);
}
else
{
console.log.apply(console, arguments); //Log timings to the console
if(console.timeStamp) { console.timeStamp.apply(console, arguments); } //Mark timing on the timeline
}
}
catch(ex) { console.error(ex); }
finally
{
window.lastLog = new Date().getTime();
}
};
console.timeline("Page Cycle"); //Start Timing
}());
(function()
{
"use strict";
var App = window.App = window.App || angular.module("App", []);
App.updateStatus = function updateStatus(status)
{
if(status) { console.$log('Status change: %s', status); }
var root = App && App.$root;
if(root) { root.$emit('mad-status', status); }
document.documentElement[status ? 'setAttribute' : 'removeAttribute']('data-status', status);
};
App.factory('ajaxTrackerService',
['$timeout',
function($timeout)
{
var stack = 0, timeout;
var fn = function()
{
if(stack === 0)
{
App.updateStatus('ready');
}
};
return {
inc: function()
{
App.updateStatus();
++stack;
$timeout.cancel(timeout);
},
dec: function()
{
if(stack > 0)
{
--stack;
}
if(stack === 0)
{
timeout = $timeout(fn, 50);
}
}
};
}]);
App.config(['$httpProvider', function($httpProvider)
{
$httpProvider.responseInterceptors.push(['ajaxTrackerService', function(ajaxTrackerService)
{
return function(promise)
{
var start = new Date().getTime();
ajaxTrackerService.inc();
var cntd = function(r)
{
var now = new Date().getTime();
var elapsed = now - start;
console.$log("Request %s took %d ms to complete", r.config.url, elapsed);
ajaxTrackerService.dec(r);
return r;
};
return promise.then(cntd, cntd);
};
}]);
}]);
App.run(['$rootScope', '$window', function($rootScope, $window)
{
$rootScope.$on('routeChangeStart', function()
{
$window.pageLoad = new Date().getTime();
(console.timeline || function() {})('Page Cycle'); //Restart timing on angular navigation
});
$rootScope.$on('mad-status', function(e, status)
{
if(status === 'ready')
{
(console.timelineEnd || function() {})('Page Cycle');
}
});
}]);
}());
@vsviridov
Owner

Note that Response Interceptors are deprecated in angular 1.2, but there's some comparable API that is available.

console.timestamp and console timeline api might only work in Chrome Canary.

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