Re: Performance issue of libtool-2.4.4

[Bob Friesenhahn]

On Tue, 3 Feb 2015, Robert Yang wrote:
> Sorry, I was wrong, tt seems that libtoolize is not the key, but libtool,
> when compile cairo-1.12.18:
>
>                 libtool 2.4.2   libtool 2.4.5
> configure:      31s             32s
> compile:        54s             64s
>
> The libtool 2.4.5 costs 10 more seconds. I'm debugging on it, any suggestion
> is appreciated.

The build slowdown must not be my imagination then.  I had attributed 
the slowdown to other factors.  Recently I noticed that build times 
for my own project were significantly longer than I remember.

Previously libtool was heavily optimized to reduce the number of forks 
(execution of child process).  This optimization should still be 
present in 2.4.2.  Any additional forks will result in a slower build.

It is not necessary to libtoolize a package in order to test its build 
performance with different libtool versions.  You can specify LIBTOOL 
in the environment (see the Makefiles) such that it points to the 
uninstalled libtool in a libtool build tree.

Bob
--
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/