Christopher Faylor wrote: >On Sun, May 26, 2002 at 05:50:13PM -0400, Don Bowman wrote: >> >>The attached patch adds a new CYGWIN environment variable, statquery. ...
>You should get the same effect by mounting directories or files with >either the -E or -X option. And, the control is more pinpoint than an >environment variable. Nope. The behaviour comes from the NT CreateFile() operation, as observed with ntfilemon (from www.sysinternals.com). That single system call opens the file, reads a bunch of (random) data from different offsets. Neither the -E nor the -X to mount has any affect on this. For interests sake, here's a (non-scientific :) benchmark: The cygwin source code (cvs co winsup) ls -lR takes: 57.171s (default options) 4.462s (new 'statquery' option) 44.002s (mount -E option) 45.171s (mount -X option) each run was done twice, and the 2nd number taken (to avoid system issues) You are perhaps correct that making this a mount option rather than an env variable would be a good way to go. Its not clear to me why the file is being opened for read during that stat anyway.
