Improving performance of javascript intervals on IE8?

I believe you may be able to improve the performance by tweaking findAndReplaceDOMText and maybe its callback too. I suppose findAndReplaceDOMText appends the element returned by the callback to the DOM, from within a loop of all matches. If it's doing that inside a loop, try to move it outside the loop, and apply the all changes to the DOM at once.

That should result in better performance, as repainting the page after each DOM update is expensive.

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