1 files changed, 62 insertions, 0 deletions
diff --git a/src/js/profiler.js b/src/js/profiler.js
new file mode 100644
index 0000000..5861ac7
--- /dev/null
+++ b/src/js/profiler.js
@@ -0,0 +1,62 @@
+/*******************************************************************************
+
+    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 = typeof performance === "undefined" ? Date : performance;
+    var time = 0;
+    var count = 0;
+    var tstart = 0;
+    var lastlog = timer.now();
+    var prompt = '';
+    var reset = function() {
+        time = 0;
+        count = 0;
+        tstart = 0;
+    };
+    var avg = function() {
+        return count > 0 ? time / count : 0;
+    };
+    var start = function(s) {
+        prompt = s || '';
+        tstart = timer.now();
+    };
+    var stop = function(period) {
+        if ( period === undefined ) {
+            period = 10000;
+        }
+        var now = timer.now();
+        count += 1;
+        time += (now - tstart);
+        if ( (now - lastlog) >= period ) {
+            console.log('µBlock> %s: %s ms (%d samples)', prompt, avg().toFixed(3), count);
+            lastlog = now;
+        }
+    };
+    return {
+        reset: reset,
+        start: start,
+        stop: stop
+    };
+})();
+
+/******************************************************************************/