[racket] cpu usage of DrRacket

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Wed Dec 21 13:36:13 EST 2011

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 [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

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