[TxMt] Spinning beach ball

Whenever I return to TextMate from a different application I am having to spend minutes watching a beach ball spinning whilst TextMate is frozen.

Various posts have suggested installing something called ReMate and enabling "Disable refresh on regaining focus" however this has made no difference and if anything the problem just gets worse.

I am using light text (usually R or SQL) files (two or three opened at a time) stored locally and am not working with projects, just individual files.

Is there a solution in TextMate or should I find a better editor?

Thanks Paul