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| author | Jeremy Allison <jra@samba.org> | 2012-09-13 10:13:21 -0700 |
|---|---|---|
| committer | Jeremy Allison <jra@samba.org> | 2012-09-13 21:31:42 +0200 |
| commit | 56b752512597acaffa94a979ef9140760e0f5cf3 (patch) | |
| tree | 8a54245369ad6042366f4d24bffadd298efbecc4 /lib/socket_wrapper/testsuite.c | |
| parent | 23158d72c8de9318e1f136331ef4d788df243af7 (diff) | |
| download | samba-56b752512597acaffa94a979ef9140760e0f5cf3.tar.gz samba-56b752512597acaffa94a979ef9140760e0f5cf3.tar.bz2 samba-56b752512597acaffa94a979ef9140760e0f5cf3.zip | |
Sigh :-(. Removing optimization prematurely is the root of all evil :-(.
Sorry for the mistake, but the LastDir singleton cache in vfs_ChDir()
actually plays an important role. When we're processing a stream of
SMB1/SMB2/SMB3 requests we don't want to add a chdir()/getcwd()
system call pair on every request if they're all on the same connection
and dealing with the same base path.
I did some testing with a program that times 1,000,000 chdir()
requests vs. 1,000,000 strcmp requests and it's a penalty of 10x
doing the system calls.
Just because it's old code, doesn't mean it's bad :-(.
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Sep 13 21:31:42 CEST 2012 on sn-devel-104
Diffstat (limited to 'lib/socket_wrapper/testsuite.c')
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