Re: performance degradation between 2006-03-03 and 2006-03-04

[Hideki IWAMOTO]

This performance degradation seems to be peculiar to 64 bit binary,
and not to happen in 32 bit binary. :-(

===== checked out with -D "2006-03-03 JST", compiled with -m32
$ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
1.400u 0.060s 0:01.46 100.0%    0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
1.416u 0.052s 0:01.46 100.0%    0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
5.652u 0.176s 0:05.83 99.8%     0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
5.728u 0.184s 0:05.91 99.8%     0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path -xs '.*' > /dev/null
12.192u 0.184s 0:12.37 100.0%   0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path -xs '.*' > /dev/null
12.144u 0.216s 0:12.36 99.9%    0+0k 0+0io 0pf+0w

===== checked out with -D "2006-03-04 JST", compiled with -m32
$ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
1.348u 0.068s 0:01.41 99.2%     0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
1.336u 0.068s 0:01.40 99.2%     0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
5.520u 0.160s 0:05.67 100.1%    0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
5.520u 0.144s 0:05.66 100.0%    0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path -xs '.*' > /dev/null
11.936u 0.224s 0:12.16 99.9%    0+0k 0+0io 0pf+0w
$ time global --nosource --nofilter=path -xs '.*' > /dev/null
12.040u 0.188s 0:12.23 99.9%    0+0k 0+0io 0pf+0w

On Wed, 15 Mar 2006 02:34:28 +0900, Hideki IWAMOTO wrote...
> Some changes that decreased the performance of global -x ".*" were made on 
> March 3. 
> However, I cannot ascertain it. 
> Are there any ideas?
> 
> GTAGSCACHE=100000000, format=compact
> source tree: linux-2.6.15
> 
> ===== checked out with -D "2006-03-03 JST"
> $ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
> 1.204u 0.076s 0:01.27 100.0%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
> 1.220u 0.056s 0:01.27 100.0%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
> 4.788u 0.152s 0:04.94 99.7%     0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
> 4.756u 0.156s 0:04.90 100.0%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path -xs '.*' > /dev/null
> 12.836u 0.256s 0:13.09 99.9%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path -xs '.*' > /dev/null
> 12.848u 0.216s 0:13.06 99.9%    0+0k 0+0io 0pf+0w
> 
> ===== checked out with -D "2006-03-04 JST"
> $ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
> 1.900u 0.092s 0:01.99 100.0%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -x '.*' > /dev/null
> 1.908u 0.080s 0:01.98 100.0%    0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
> 9.676u 0.148s 0:09.82 99.8%     0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path --nofilter=sort -xr '.*' > /dev/null
> 10.400u 0.164s 0:10.56 100.0%   0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path -xs '.*' > /dev/null
> 18.801u 0.196s 0:18.99 100.0%   0+0k 0+0io 0pf+0w
> $ time global --nosource --nofilter=path -xs '.*' > /dev/null
> 18.789u 0.216s 0:19.00 99.9%    0+0k 0+0io 0pf+0w

----
Hideki IWAMOTO  address@hidden