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Re: gcj/253: problems with instanceof when compilation from .classfiles
- To: Bryce McKinlay <bryce at albatross dot co dot nz>
- Subject: Re: gcj/253: problems with instanceof when compilation from .classfiles
- From: "Gregory R. Warnes" <warnes at biostat dot washington dot edu>
- Date: Wed, 7 Jun 2000 06:11:55 -0700 (PDT)
- cc: java-gnats at sourceware dot cygnus dot com, gcj Discussion List <java-discuss at sourceware dot cygnus dot com>
One more set of timings, this time with optimization enabled:
GRW>> FYI, my code is a simulation based tool, and compiling with gcj gives a
GRW>> significant speedup over using a jit:
GRW>>
GRW>> 10,000 iterations 100,000 iterations
GRW>> ----------------- ------------------
GRW>> Blackdown java 1.2.2 RC3 (w jit): 15 Seconds 143 Seconds
GRW>> gcj: 9 Seconds 90 Seconds
gcj -02: 7 Seconds 73 Seconds
(-02 results agree with plain gcj and java results to 14 decimal places)
Using gcj with -02 cuts execution time in half. This will help a lot
because I have a set of simulations to run that would have taken about
week even using my 24 node beowulf cluster. This cuts it down to about 3
days.
Thanks guys!!!
Greg Warnes