[kaffe] initial performance comparisons between kaffe-1.1.5 and jamvm 1.3.0 on ARM

[pancake]

JIT is heavy for simple-test benchmarkings. VM takes more time loading classes and converting them into native code than executing the bytecode step by step like jamvm does. That's why your benchmarks brings JamVM better results.

Yes...would be good to have a fast bootup, but this may repercute on time performance for large applications.

Test this:
http://news.nopcode.org/test.java

PD: use System.getCurrentMillis() instead of cmdline 'time'.

On Wed, 06 Apr 2005 11:10:52 +0200
gian paolo ciceri <gp.ciceri at acm.org> wrote:

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> Hash: SHA1
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> Hello all,
> I've tested with a simple "hello world" program my arm ports
> of both latest kaffe and jamvm: here what it happens
> 
> - ----
> bash# time
> /usr/local/kaffe-1.1.5-JIT-arm-qt-crosstool-glibc213/bin/kaffe Hello
> Hello World!
> 24.09user 4.11system 0:28.20elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (1634major+5559minor)pagefaults 0swaps
> 
> bash# time /usr/local/jamvm-1.3.0-arm-glibc213/bin/jamvm -Xmx16M
> - -classpath /ProveJava Hello
> Hello World!
> 0.91user 0.60system 0:01.51elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
> 0inputs+0outputs (170major+411minor)pagefaults 0swaps
> - ----
> 
> On my Gnu/Intel FC3 here's the same test results
> - ----
> [gpciceri at sandra ~]$ time /usr/local/kaffe-1.1.5/bin/kaffe Hello
> Hello World!
> 
> real    0m0.281s
> user    0m0.239s
> sys     0m0.028s
> [gpciceri at sandra ~]$ time /usr/local/jamvm-1.3.0/bin/jamvm Hello
> Hello World!
> 
> real    0m0.122s
> user    0m0.087s
> sys     0m0.026s
> - ----
> 
> Can this "speeddown" between kaffe and JamVM on Arm be justified from
> the fact that (on Arm) I've had to build kaffe with --with-engine=jit
> (intrp does not work, jit3 is disabled on Arm) while on inlet I've used
> defaults, so jit3 ?
> 
> Any test to suggest in order to try to reduce this speeddown ?
> TIA
> /gp
> 
> - --
> gian paolo ciceri - japanman
> suddenthinks, excellence through refactoring
> ++39 340 7218101
> gp.ciceri at acm.org
> gp.ciceri at suddenthinks.com
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> -- 
> gian paolo ciceri - japanman
> suddenthinks, excellence through refactoring
> ++39 340 7218101
> gp.ciceri at acm.org
> gp.ciceri at suddenthinks.com
> 
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