Created
March 6, 2012 11:17
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| <!DOCTYPE html> | |
| <html lang="ja"> | |
| <head> | |
| <title></title> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var LS = { | |
| _: {}, | |
| _timer: null, | |
| setItem: function(k,v){ | |
| var _ = this._; | |
| _[k] = v; | |
| setTimeout(function(){ | |
| localStorage.setItem(k, _[k]); | |
| }, 64); | |
| }, | |
| getItem: function(k,v){ | |
| return this._[k] || localStorage.getItem(k); | |
| } | |
| } | |
| var TIMES = 10000; | |
| function bench(label, fn){ | |
| var start = new Date; | |
| for(var i=0; i<TIMES; i++) { | |
| fn(); | |
| } | |
| var end = new Date; | |
| var ms = end.getTime() - start.getTime(); | |
| console.log(label, ms); | |
| } | |
| bench("localStorage", function(){ | |
| localStorage.setItem('foo', "foo"); | |
| }); | |
| bench("cookie", function(){ | |
| document.cookie.foo = "foo"; | |
| }); | |
| var tmp = {}; | |
| bench("object", function(){ | |
| tmp["foo"] = "foo"; | |
| }); | |
| bench("LS", function(){ | |
| LS.setItem('foo', "foo"); | |
| }); | |
| bench("localStorage(get)", function(){ | |
| return localStorage.getItem('foo'); | |
| }); | |
| bench("cookie(get)", function(){ | |
| return document.cookie.foo; | |
| }); | |
| bench("object(get)", function(){ | |
| return tmp["foo"]; | |
| }); | |
| bench("LS(get)", function(){ | |
| return LS.getItem('foo'); | |
| }); | |
| </script> | |
| </body></html> |
This is just for demonstration that this is why lack of any mechanism/feature.
You shouldn't use this in production env.
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Intel X25-E SSD
Chromium 18.0.997.0 (Developer Build 116462 Linux) Built on Ubuntu 11.04, running on Ubuntu 11.10
on my computer result:
localStorage 2890
cookie 1026
object 0
LS 27
localStorage(get) 2343
cookie(get) 1380
object(get) 0
LS(get) 1