On 4/20/07, Mikhail Fursov <[EMAIL PROTECTED]> wrote:
Did you try -Xem:server mode?
With -Xem:server, it gets another 10% performance improvement. :)
On 4/20/07, Leo Li <[EMAIL PROTECTED]> wrote:
>
> Great!
>
> On 4/20/07, Alexey Varlamov <[EMAIL PROTECTED]> wrote:
> >
> > Cool! On which VM did you measure?
> >
> > 2007/4/20, Alexey Petrenko <[EMAIL PROTECTED]>:
> > > Nice to hear that :)
> > >
> > > SY, Alexey
> > >
> > > 2007/4/20, Andrew Zhang <[EMAIL PROTECTED]>:
> > > > Hey guys,
> > > >
> > > > I wrote a small performance benchmark for testing List.add(int
> index,
> > Object
> > > > element). Beyond my expectation, Harmony's ArrayList is amazingly
> fast
> > > > compared with RI. The test scenario is very simple:
> > > >
> > > > 1. fill a list with 100,000 elements
> > > > for (int i = 0; i < LIST_COUNT; ++i) {
> > > > list.add(element);
> > > > }
> > > > 2. add another 100,000 elements into this list in the random index
> > from 0 -
> > > > 100,000.
> > > > for (int i = 0; i < LIST_COUNT; ++i) {
> > > > list.add(indexGenerator.nextInt(LIST_COUNT),element);
> > > > }
> > > >
> > > > For step2, Harmony's ArrayList 50% - 100% faster than RI!
> > > >
> > > > Here's the result from my machine:
> > > > 1st run:
> > > > Harmony ArrayList insert1: elapsed = 10ms
> > > > Harmony ArrayList insert2: elapsed = 14861ms
> > > > Harmony Vector insert1: elapsed = 70ms
> > > > Harmony Vector insert2: elapsed = 30333ms
> > > >
> > > > RI ArrayList insert1: elapsed = 110ms
> > > > RI ArrayList insert2: elapsed = 29532ms
> > > > RI Vector insert1: elapsed = 70ms
> > > > RI Vector insert2: elapsed = 30384ms
> > > >
> > > > 2nd run:
> > > > Harmony ArrayList insert1: elapsed = 20ms
> > > > Harmony ArrayList insert2: elapsed = 14941ms
> > > > Harmony Vector insert1: elapsed = 70ms
> > > > Harmony Vector insert2: elapsed = 31345ms
> > > >
> > > > RI ArrayList insert1: elapsed = 70ms
> > > > RI ArrayList insert2: elapsed = 31726ms
> > > > RI Vector insert1: elapsed = 60ms
> > > > RI Vector insert2: elapsed = 31095ms
> > > >
> > > > Very good work!
> > > >
> > > > --
> > > > Best regards,
> > > > Andrew Zhang
> > > >
> > >
> >
>
>
>
> --
> Leo Li
> China Software Development Lab, IBM
>
--
Mikhail Fursov
--
Best regards,
Andrew Zhang
