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 >
