On Wed, 11 Jun 2003 13:02:16 +0200 "Kevin D. Kissell" <[EMAIL PROTECTED]> wrote:
> > > Our of curiousity, I configured the MIPS/Linux interpretive kaffe > > > with --disable-debug, for speed, and ran the Embedded CaffeieneMark > > > benchmark. Comparing the result with an equivalent 1.0.7-based build, > > > we can see that a bunch of things have improved a little, some things > > > have stayed the same, and that something has slowed down dramatically > > > in string handling which more than cancells all the other improvements. > > > > > > [ test results skipped ] > > > > If you've got some time to waste, it'd be nice if you could > > compare the performance of 1.0.7's System.arraycopy() with > > the performance of 1.1.0's System.arraycopy() (nothing serious, > > just create a huge array and measure how long it takes to > > copy that array). > > Before going through the hassle of rebuilding/re-installing to > try your experiment, I thought I'd look at the code. Jeez. > No wonder. In 1.0.7, System.arraycopy() was a native > method, defined in libraries/clib/native/System.c, which used > the platform's memmov/memcpy functions. Now > it's a Java implementation. Certainly easier to maintain > that way, but it's unsurprising if it's more than 5 times slower. It's almost the same thing with jit3 on i386 here. With a pure java implementation of System.arraycopy() I get a String score of 1693, with a native implementation I get a String score of 2899. Given that System.arraycopy() is used all over the place, I'm currently tempted to revert the pure java implementation. Any thoughts? Greetings, Helmer _______________________________________________ kaffe mailing list [EMAIL PROTECTED] http://kaffe.org/cgi-bin/mailman/listinfo/kaffe
