On Jan 11, 6:50 am, Massimiliano Mirra <[EMAIL PROTECTED]> wrote:
> I came across this while writing a templating engine for Helma.
>
> "js.jar" is built from a fresh cvs.mozilla.org checkout,
> "js-noxmlbeams.jar" is the same without
> org/mozilla/javascript/xml/impl/xmlbeans/ (thus using
> .../javascript/xmlimpl/), "js" is spidermonkey 1.8, java is j2se6,
> time is in msecs:
>
> [EMAIL PROTECTED]:/tmp/w/seethrough_helma$ java -Djava.compiler=NONE -jar
> js.jar -opt 9 e4x_bm.js
> times per run: 10000
> run #0 total time: 42596
> run #1 total time: 48355
> run #2 total time: 51056
> run #3 total time: 52297
> [EMAIL PROTECTED]:/tmp/w/seethrough_helma$ java -Djava.compiler=NONE -jar js-
> noxmlbeans.jar -opt 9 e4x_bm.js
> times per run: 10000
> run #0 total time: 38487
> run #1 total time: 45523
> run #2 total time: 43726
> run #3 total time: 46889
> [EMAIL PROTECTED]:/tmp/w/seethrough_helma$ js e4x_bm.js
> times per run: 10000
> run #0 total time: 18
> run #1 total time: 6
> run #2 total time: 19
> run #3 total time: 6
> [EMAIL PROTECTED]:/tmp/w/seethrough_helma$ cat e4x_bm.js
> function bm(fn, times) {
> times=times||100;
> var start=Date.now();
> for(var i=0;i<times;i++)
> fn();
> return (Date.now() - start);
>
> }
>
> var runs = 4;
> var times = 10000;
>
> print('times per run: ' + times);
>
> for(var i=0;i<runs; i++) {
> var total = bm(function(){ <test/> }, times);
> print('run #' + i + ' total time: ' + total);}
Submitted to bugzilla as bug 411895 (https://bugzilla.mozilla.org/
show_bug.cgi?id=411895). I think it's worth looking into --
approaching SM performance may not be possible given the Rhino
infrastructure, but a 2000-4000x differential is notable. :)
What platform are we talking about on which you're running
SpiderMonkey and the JVM?
-- David P. Caldwell
http://www.inonit.com/
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