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Postings from August 2001
--- Armin Obersteiner <armin@xos.net> wrote: > > > in short: i hab a 600M hash-of-arrays-of-hashes. 500M > > > pysically. > > > i fill up the hash: 80 seconds, i calculate > something: 10 > > > seconds, > > > then: exit. the whole procedure takes 15 minutes > more. > > > (perl 5.6, no modules used > > > execpt strict) > > > > > > after i filled in some print statements, i now know > where > > > it happens: > > > at the exit. > > > > > > with a 'system "kill -9 $$"' as last line the program > > > just takes 90 seconds. > > > (as expected) > > > > > > is there some garbage collection taking place? it > seems > > > unnecessary at the end, > > > doesn't it? Got another idea. This could be as simple as the fact that you're exiting normally. I'm not entirely sure, but I seem to remember that glibc itself releases all its memory on exit(), causing the kernel to have to touch and then release all the mappings (whereas the kernel simply blows everything away when a process is killed). One thing you could try is to add a 'use POSIX ();' at the beginning and a 'POSIX::_exit(0);' at the end, thereby short-circuiting glibc's shutdown stuff. Just be sure that all your I/O buffers are flushed first. -- BKS __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/Thread Previous | Thread Next