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August 29, 2015 13:58
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| <!doctype html> | |
| <html> | |
| <body> | |
| <script> | |
| var timers = {}; | |
| var _console = {}; | |
| var _console_cache = []; | |
| _console.time = function( name ) { | |
| if ( name ) { | |
| timers[ name ] = (new Date()); | |
| } | |
| } | |
| _console.timeEnd = function( name ) { | |
| if ( timers[ name ] ) { | |
| _console_cache.push( name + ': ' + ((new Date()) - timers[ name ]) + 'ms' ); | |
| delete timers[ name ]; | |
| } | |
| } | |
| function test1(){_console.time('test a'); | |
| b = {a:{b:{c:{d:{e:{f:{g:{length:100000000}}}}}}}} | |
| for(var i=0; i<b.a.b.c.d.e.f.g.length--; i++) ; | |
| _console.timeEnd('test a'); | |
| } | |
| function test2(){_console.time('test b'); | |
| b = {a:{b:{c:{d:{e:{f:{g:{length:100000000}}}}}}}} | |
| c = b.a.b.c.d.e.f.g.length | |
| for(var i=0; i<c--; i++) ; | |
| _console.timeEnd('test b'); | |
| } | |
| for(var i=0; i<10; i++)test1() | |
| for(var i=0; i<10; i++)test2() | |
| for(var i in _console_cache)document.write(_console_cache[i]+"</br>") | |
| </script> | |
| </body> | |
| </html> |
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