Extjs is cool; but very slow on firefox !

[stailer]

(sorry for my poor english)

I test ExtJS and it's very good... Grid and EditorGrid are very good tools. And on Internet Explorer 6 or 7 , it's rapid.

BUT on firefox (all versions), it's very slow ! Normal or it's a know problem ?

Thanks for your responses.

Jeff

[BernardChhun]

it's weird cause for me it's the opposite.

very fast on Firefox, medium speed on IE7 and laggy on IE6....

[Grimsk]

ext rock on FF \:D/

[JeffHowden]

Disable firebug and try again.

[stailer]

Ok thank you.

With firebug disabled and webdevelopper disabled on firefox.. it's rapid. Not too rapid than Internet Explorer but it's correct.

Thank you, ExtJS is very RooooOOoox !! ;)

[hendricd]

Dean Edwards has a couple of notes on FF here (http://dean.edwards.name/weblog/2007/08/firebug-slow/), you might want to review as well.

[softlion]

Will this be fixed in ext.js 2.0 ?

When enabling javascript.options.strict (in about:config) in FF, firebug shows lots of warnings.
This is why pages are loading slowly.

I'm using ext.js 1.1.1 full.

[hendricd]

it only runs slowly if javascript.options.strict is on, as FF then makes the attempt at strict syntax checking (that's the overhead), not because some Extjs code generates strict warnings.

[bryman55]

Even after following all the suggestions above, Extjs grid is extremely slow. Under Chrome and IE its wicked fast. I have no problems loading 600 rows with 5 columns under Chrome or IE. What is strange is when I go to scroll up or down with the slider or pressing up/down arrows the CPU is pegged. But if I scroll with the middle mouse wheel there is no delay. Moving Column headers around there is delay.

Firebug is disabled, web developer is disabled, javascript.options.strict;false.

Any ideas?

[abe.elias]

Does this happen with the buffered grid view as well?

http://extjs.com/deploy/ext-3.0-rc1.1/examples/grid/buffer.html

[arthurakay]

I wonder if it might be some other factor with your browser... open tabs, etc.

A quick Google search returns a number of (sometimes contradicting, and not all scientific) studies:
- http://lifehacker.com/5044668/beta-browser-speed-tests-which-is-fastest
- http://news.cnet.com/8301-1001_3-10030888-92.html
- http://www.gadgets-reviews.com/chrome-vs-opera-ie-firefox.html

The point being that you might have a memory issue, which could be caused by any number of factors. All of the studies I read seemed to show that Firefox is not the most efficient browser for managing memory (nor always the worst), so see if there's anything you can clean up.

[dbassett74]

Even faster in Google Chrome. I'm very impressed by the speed of Chrome. But FireFox is a close second, with IE6 being snail.. Why do so many people (and corporate environments) still insist on using M$ IE?