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);
}
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