Re: Performance issue of libtool-2.4.4

[Robert Yang]

Hello,

After removing the two lines, libtool 2.4.5 is a little slower than 2.4.2
when using /bin/dash, but it is much slower than in bash, here is the
data when compile xz: (make -j1)

      lt-2.4.2  lt-2.4.5(before patched)  lt-2.4.5(after patched)
dash     11s          21s                    13s
bash     13s          30s                    21s


We can see that dash is much faster than bash. (note, the data I had reported
before for lt-2.4.5 after patched is 11s, but today is 13s, I think that
it is because of the free disk space, the data is very stable in each day,
I tried them several times).

// Robert

On 02/04/2015 10:56 PM, Robert Yang wrote:
> On 02/04/2015 10:48 PM, Bob Friesenhahn wrote:
> > On Wed, 4 Feb 2015, Robert Yang wrote:
> >
> > > When reporting a bug, please describe a test case to reproduce it and
> > > include the following information:
> > >
> > >       host-triplet:   $host
> > >       shell:          $SHELL
> > >       compiler:       $LTCC
> > >       compiler flags: $LTCFLAGS
> > >       linker:         $LD (gnu? $with_gnu_ld)
> > >       version:        $progname (GNU libtool) 2.4.5
> > >       automake:       `($AUTOMAKE --version) 2>/dev/null |$SED 1q`
> > >       autoconf:       `($AUTOCONF --version) 2>/dev/null |$SED 1q`
> >
> > Perhaps libtool is accidentially executing 'automake --version' and 'autoconf
> > --version' every time it is executed?  That would certainly lead to a huge
> > slowdown.
>
> Thanks, yes, you are right, after remove the two lines, the time is the
> same as remove the whole block (11s).
>
> // Robert
>
> > Bob
>
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