CODEWITHSUNDEEP
javascriptperformanceinternet-explorerfirefox
George2
George2

Reputation: 45771

javascript slow in IE but fast in Firefox

It is very slow to access this page using IE, but much faster using Firefox. Especially when I increase the number of nodes of people. Any ideas what is wrong?

http://thejit.org/static/v20/Jit/Examples/RGraph/example1.html

BTW: IE is even slow when accessing from local file system.

thanks in advance, George

Upvotes: 4

Views: 30331

Answers (4)

Shivam Tyagi
Shivam Tyagi

Reputation: 168

Guys Got the Culprit here... :) :)

After doing lot of RnD on Server side and Client side, I took a look at "Developer Tool" in IE. You can find something like "Document Mode: Quirks". If you check the Wiki page for this Quirks mode, You can find a definition as "In computing, quirks mode refers to a technique used by some web browsers for the sake of maintaining backward compatibility with web pages designed for older browsers, instead of strictly complying with W3C and IETF standards in standards mode."

So this all becuase of checking for compatibility for all components on page. And hence the performance issue. :)

And When I changed this mode to IE 8 Standard. Things started working really well.

IE and its issues ...!!!! :D

Upvotes: 0

darioo
darioo

Reputation: 47183

Internet Explorer's Javascript engine is slower than that from other web browsers, at least when using IE with versions lower than 9. So, if you're using IE 6, 7 or 8, now you know why.

Like raynjamin said, try testing IE using Sunspider.

The latest stable Firefox (3.6) is fast, but for example, Google Chrome is even faster. A browser's Javascript speed depends on its underlying implementation.

Update: to give you an idea of how "fast" IE is compared to other browsers, I've done a benchmark on my own computer using Sunspider 0.9.1. Here are the results:

- Internet Explorer 8: 5039.8ms
- Firefox 3.6:          967.9ms (loaded with extensions)
- Chrome 9:             276.3ms
- Opera 10.6:           293.2ms
- Safari 5:             397.0ms

As you can see, IE 8 is about 5 times slower than Firefox 3.6 and almost 20 times slower than Chrome 9, at least when using Sunspider tests. That is a drastic difference and you can see that IE 8 isn't all that fast.

Update 2: There is one way to make IE faster. A plugin called Chrome frame exists. Using this plugin will make IE faster since it will use Chrome's engine. I haven't tried it personally, but I've heard good things about it.

Upvotes: 18

Raynos
Raynos

Reputation: 169391

IE is slow. Fact.

Upvotes: 8

raynjamin
raynjamin

Reputation: 788

Javascript runs much slower in IE than in other modern browsers. You can test it for yourself using a javascript benchmark like sunspider.

Upvotes: 3

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