On Wed, 06 Sep 2006 14:26:32 +0200, Marco Pesenti Gritti wrote: > The reduced test case I attached to the mail starting this thread is > doing only "open". > > On the OLPC: > > Total "import gtk" time : 0.9 secs > 500 opens with my testcase: 0.35 secs > (import gtk cause around 500 opens) > > Note that I'm ignoring all the "stat". Still, this seem to be a good > part of the startup time.
Profiles from my own system are here: http://plan99.net/~mike/python.modules.oprofile http://plan99.net/~mike/python.symbols.oprofile I think the open() related parts would be: 53 0.5516 vmlinux-2.6.16.13-4-default do_page_fault ... 32 0.3330 vmlinux-2.6.16.13-4-default __d_lookup One issue I see - your test case is written in Python itself, whereas the Python VM is written in C. On my system this makes a big difference: [EMAIL PROTECTED]:/tmp> time ./opentest real 0m0.136s user 0m0.000s sys 0m0.076s [EMAIL PROTECTED]:/tmp> time python ./opentest.py 10000 open: 0.507028 real 0m0.677s user 0m0.456s sys 0m0.112s #include <string.h> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> int main() { char fname[1024]; for (int i = 0; i < 10000; i++) { sprintf(fname, "/tmp/foo.%04d", random() % 9999); open(fname, O_RDONLY); } } thanks -mike _______________________________________________ Sugar mailing list [email protected] http://mailman.laptop.org/mailman/listinfo/sugar
