[racket] cpu usage of DrRacket

We tracked this down to a Win64-specific problem with the recent JIT
switch from x87 to SSE for floating point --- now fixed.

Thanks for the report!

At Wed, 14 Dec 2011 13:52:05 +0100, "Jos Koot" wrote:
> I see that after starting up, DrRacket constantly uses between 40 and 60 %
> of my two CPUs, even with empty definitions window and before doing anything
> by myself.
>  
> I use:
> Welcome to DrRacket, version 5.2.0.6--2011-12-10(6fae172/a) [3m]
> without debugging and without preserving stacktrace.
> Language determined by #lang line.
> Disabling online expansion does not decrease CPU usage.
>  
> What may be the reason for DrRacket to use so much CPU at moments I would
> expect it to be idle?
> Thanks, Jos