[racket] cpu usage of DrRacket

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Sat Dec 24 10:30:14 EST 2011

Thanks for the kind words, Jos!


On Sat, Dec 24, 2011 at 9:09 AM, Jos Koot <jos.koot at telefonica.net> wrote:
> Matthew and Robby,
> I just checked the memory usage of the windows 7 64 bit version of DrRacket
> (version [3m].) Despite the obscurity of the
> problem, the fix was made quickly. It works great. I checked both single and
> twin CPU usage.
> The quick responses of PLT keeps amazing me. I can remember times (long ago)
> when it sometimes took half a year to convince and to prove to an expensive
> company that its system had a bug, let alone the time required to fix it. I
> know you are a team rather than a company, but nevertheless ...; I hope your
> funds for maintenance and further development of Racket and more profound
> scientific studies in informatics are not in danger. I am sure that,
> whatever expenses may be involved, the benefit for research and the world
> certainly exceeds the costs.
> Thanks very much.
> Jos
> -----Original Message-----
> From: Matthew Flatt [mailto:mflatt at cs.utah.edu]
> Sent: miércoles, 21 de diciembre de 2011 19:36
> To: Jos Koot
> Cc: users at racket-lang.org
> Subject: Re: [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 [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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