loop is too slow for IE7/8

问题

I have a loop execution that needs to run in all browsers.

in chrome/ff etc the execution runs fast and fine. in IE it's slow and end's up dispatching a prompt saying a script is running slow (no good).

Any ideas on how to get around something like this? I mostly just need to get rid of the IE prompt for 7/8

** edit **

Here's code:

if(this.handicap()) {
    while(this.hasGraphChanged()) {
        this.gravity(this.separate());
    }
}

This is a VERY large project, so instead of listing all the code, I'll go for a quick explanation.

this.handicap: returns true if the browser if IE7/8 this.hasChanged: returns true/false depending if there is a change AFTER a draw update this.gravity: processes drawing algorithm based on p1(array)

回答1:

You can use some asynchronous iteration technique instead of loops. Watch Asynchronous Iteration Patterns by Pedro Teixeira for a nice introduction. It uses Node.js but you can use the same patterns in the browser.

回答2:

What exactly does the loop do? Is the number of iterations deterministic? If this is something which is causing the browser to hang you may want to consider javascript worker-threads https://developer.mozilla.org/En/Using_web_workers (although I'm not sure which browsers currently support this feature).

来源：https://stackoverflow.com/questions/5095161/loop-is-too-slow-for-ie7-8