Yeah, "Check Spelling as You Type" is a real resource hog in TM... Don't know why.
So better turn it off and switch on when you really need to check spelling.

On Feb 18, 2008 8:03 PM, Alex Ross <ajross@cs.pdx.edu> wrote:
> This is the first time I've ever experienced this problem.  I was
> typing
> along in TextMate and suddenly it started to get really sluggish, so I
> pulled up activity monitor and whenever I edit text in TextMate, it
> shoots
> up to 50 or 60% CPU usage.  I have an Intel Core 2 Duo MBP running OSX
> 10.5.2 and TextMate Version 1.5.7 (1455).  I usually leave TextMate
> open for
> days at a time and I've never had this problem before.  I tried
> closing
> TextMate and reopening and that didn't do anything.  Any ideas what
> might
> be causing that?

Turn off spell checking.  Edit > Spelling > Check Spelling as You Type.

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