uBlock/js/profiler.js

83 lines
2.3 KiB
JavaScript

/*******************************************************************************
µBlock - a Chromium browser extension to block requests.
Copyright (C) 2014 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/******************************************************************************/
var quickProfiler = (function() {
/******************************************************************************/
var timer = performance;
var time = 0;
var count = -3;
var tstart = 0;
var lastlog = timer.now();
var prompt = '';
/******************************************************************************/
var reset = function() {
time = 0;
count = -3;
tstart = 0;
};
/******************************************************************************/
var avg = function() {
return count > 0 ? time / count : 0;
};
/******************************************************************************/
var start = function(s) {
prompt = s || '';
tstart = timer.now();
};
/******************************************************************************/
var stop = function() {
count += 1;
if ( count > 0 ) {
var now = timer.now();
time += (now - tstart);
if ( (now - lastlog) > 10000 ) {
console.log('µBlock() > %s: %s ms', prompt, avg().toFixed(3));
lastlog = now;
}
}
};
/******************************************************************************/
return {
reset: reset,
start: start,
stop: stop
};
/******************************************************************************/
})();
/******************************************************************************/