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 _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
