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From "Dominique Devienne" <ddevie...@gmail.com>
Subject RE: Performance difference between 1.6.1 and 1.6.4 (in eclipse)
Date Mon, 27 Jun 2005 14:29:20 GMT
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.

Thanks, --DD

PS: the 9,987.65 are for a German locale, reverse of US convention.
PPS: Percentages go above 100% because consider nested tasks too.
PPPS: the task execution count was identical in 1.6.5 (not shown)


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