In article <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] (Chris Nandor) wrote:
> In my experience, Panther is quite a bit faster with Mac::Carbon startup
> than Jaguar was. I've got some benchmarks I keep meaning to clean up and
> post. The time spent in dyld has -- the biggest problem -- has been
> dramatically reduced.
Boy howdy, is it. The system is an iBook G3/600 with 256MB RAM. The first
test is with Mac OS X 10.2.8.
$ time perl -MMac::Glue -e 'Mac::Glue->new("Finder")->activate'
real 0m21.445s
user 0m7.100s
sys 0m0.510s
$ time perl -MMac::Carbon -e1
real 0m19.885s
user 0m6.810s
sys 0m0.220s
The second is Mac OS X 10.3.2.
$ time perl -MMac::Glue -e 'Mac::Glue->new("Finder")->activate'
real 0m2.067s
user 0m1.430s
sys 0m0.320s
$ time perl -MMac::Carbon -e1
real 0m1.300s
user 0m1.130s
sys 0m0.140s
Wow. That's pretty dramatic. More than 10x faster in real, and about 5x
faster in user+sys. Why the speedup?
The slowest thing with Mac::Carbon was always in loading the modules on
startup, with most of the time spent in dyld. Over 90% of that time in the
Mac::Glue test in Mac OS X 10.2.8 was spent in dyld. In the Mac OS X 10.3.2
version it is still over 75%, but, obviously, much less time is spent there.
Before, it was spending over half of its time in link_library_module and
add_reference combined, and about 20% in relocate_symbol_pointers/
relocate_symbol_pointers_in_library_image. Now, it still spends about 20%
in the latter, but the former don't show up at all. And that 20% is a lot
less than in the original, since the total time is so much shorter.
I don't know what all that means exactly, but I do know that yeeha, Panther
is a lot faster at loading in them shared libraries.
--
Chris Nandor [EMAIL PROTECTED] http://pudge.net/
Open Source Development Network [EMAIL PROTECTED] http://osdn.com/
