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authorJeremy Allison <jra@samba.org>2012-09-13 10:13:21 -0700
committerJeremy Allison <jra@samba.org>2012-09-13 21:31:42 +0200
commit56b752512597acaffa94a979ef9140760e0f5cf3 (patch)
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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
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