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Firefox 10+: poor js performances on a html page loaded from filesystem
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willy...@gmail.com
May 30, 2012, 4:50:29 AM5/30/12
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I built a fairly complex javascript framework, based on YUI3, to render Forms in a web page; as I was testing it I got very very disappointed by the speed of execution of this rendering on Firefox 10+; the exact same page on Chrome was running 10x quicker.
Then I tried again, but instead of opening this test page from the filesystem (ie. the address bar showing "file:///..."), I loaded through a local webserver (address bar: "http://....").
To my big surprise and relief, I found the performances on par to Chrome.
Do you guys know if there's a reason for this behaviour? I'm not saying it's a problem, since that javascript will always be served through a web server, but it got me very curious.
Thanks!
Then I tried again, but instead of opening this test page from the filesystem (ie. the address bar showing "file:///..."), I loaded through a local webserver (address bar: "http://....").
To my big surprise and relief, I found the performances on par to Chrome.
Do you guys know if there's a reason for this behaviour? I'm not saying it's a problem, since that javascript will always be served through a web server, but it got me very curious.
Thanks!
Boris Zbarsky
May 30, 2012, 9:43:27 AM5/30/12
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On 5/30/12 4:50 AM, willy...@gmail.com wrote:
> Do you guys know if there's a reason for this behaviour?
Some things have special security checks that only happen in a file://
> Do you guys know if there's a reason for this behaviour?
context. But past that, it's really hard to say.
If you can put a zip or tarball of the app somewhere so that I could run
it under a profiler, I could give you a better idea of what's going on.
-Boris
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