Re: cost of popen()

[Hideki IWAMOTO]

On Mon, 04 Jul 2005 22:13:34 +0900, Hideki IWAMOTO wrote...
> On Mon, 04 Jul 2005 21:56:29 +0900, Shigio Yamaguchi wrote...
> > > How about "global -f"? Is the --noxargs option required also for global?
> > 
> > I think it is not needed, because there is, I believe, no user visible 
> > change.
> 
> OK. I will rewrite a patch.

This is a revised version.

Changes from previous version are
 * Add --noxargs option. This is used for both of creation and update.
 * Return verbose message of incremental updating to rev 1.114 of gtags.c.

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Comparison of execution time

[bison-2.0]$ time gtags
0.469u 0.358s 0:01.59 50.9%     0+0k 0+0io 0pf+0w
[bison-2.0]$ time gtags --noxargs
0.547u 0.762s 0:02.09 62.2%     0+0k 0+0io 0pf+0w
[bison-2.0]$ global -P | xargs touch
[bison-2.0]$ time gtags -i
0.482u 0.374s 0:01.60 53.1%     0+0k 0+0io 0pf+0w
[bison-2.0]$ global -P | xargs touch
[bison-2.0]$ time gtags -i  --noxargs
0.600u 0.757s 0:02.10 64.2%     0+0k 0+0io 0pf+0w

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verbose message of incremental updating

[bison-2.0]$ touch src/assoc.[ch]
[bison-2.0]$ gtags -iv
checking /home/iwamoto/tmp/bison-2.0/GTAGS
GTAGS found at '/home/iwamoto/tmp/bison-2.0/GTAGS'.
[Tue Jul 05 00:00:00 JST 2005] Gtags started.
 Using config file '/home/iwamoto/.globalrc'.
 Tag found in '/home/iwamoto/tmp/bison-2.0'.
 Incremental update.
[Tue Jul 05 00:00:00 JST 2005] Updating 'GTAGS'.
 deleting tags of src/assoc.h
 deleting tags of src/assoc.c
 adding tags of src/assoc.h
 adding tags of src/assoc.c
[Tue Jul 05 00:00:00 JST 2005] Updating 'GRTAGS'.
 deleting tags of src/assoc.h
 deleting tags of src/assoc.c
 adding tags of src/assoc.h
 adding tags of src/assoc.c
[Tue Jul 05 00:00:00 JST 2005] Updating 'GSYMS'.
 deleting tags of src/assoc.h
 deleting tags of src/assoc.c
 adding tags of src/assoc.h
 adding tags of src/assoc.c
 Global databases have been modified.
[Tue Jul 05 00:00:00 JST 2005] Done.

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Hideki IWAMOTO  address@hidden

gtags-add6.patch
Description: Binary data