| Performance difference between 1.6.1 and 1.6.4 (in eclipse) | Performance difference between 1.6.1 and 1.6.4 (in eclipse) 2005-06-28 - By Kev Jackson
Dominique Devienne wrote:
>Ullrich was kind enough to provide me data gathered by
>my own performance listener, which shows timings for
>tasks as well as targets:
>
>Timing by tasks in Ant 1.6.2: in Ant 1.6.5
>----------- ------ ------ ---------- ----------- ------
>19.578,0 ms 175,2% 24x antcall 62.235,0 ms 189,0%
> 5.638,0 ms 50,5% 434x see.get 6.308,0 ms 19,2%
> 1.957,0 ms 17,5% 25x import 14.238,0 ms 43,2%
> 1.269,0 ms 11,4% 15131x property 11.775,0 ms 35,8%
> 563,0 ms 5,0% 43x delete 608,0 ms 1,8%
> 93,0 ms 0,8% 101x dirname 221,0 ms 0,7%
> 47,0 ms 0,4% 1x tstamp 47,0 ms 0,1%
> 30,0 ms 0,3% 25x presetdef 16,0 ms 0,0%
> 15,0 ms 0,1% 430x basename 453,0 ms 1,4%
> 0,0 ms 0,0% 78x mkdir 64,0 ms 0,2%
>
>11.172,0 ms 100,0% 1x TOTAL 32.922,0 ms 100,0%
>
>So this data seems to indicate a significant slow down of
><import> and <property> more than <antcall>. The combined
>slow down of these 2 tasks amounts to 23.2 seconds which
>is pretty much the whole slow down. <antcall>'s own perf
>data is masked by that of the nested tasks, but most
>likely peanuts.
>
>Does anybody have any clue to why these two tasks got so
>much slower in between patch releases? The slow down of
><import> is more dramatic than <property>, since for
>25 calls 'only'.
>
>15K <property> calls might be unusual a bit, but still.
>
>
>
Checking importTask revisions shows nothing that should cause a massive
slowdown.
Could it have something to do with no longer caching the
introspectionhelper in IntrospectionHelper getHelper?
Kev
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