Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance

[Derry Shribman]

Hi,

 >> I have prepared a patch with the following changes (I know you guys
 >> prefer separate patch for each change - I will send multiple patches
 >> later today):
 >>
 > This is really interesting stuff but I will say it again: I do not like
 > piling on CYGWIN environment variable options to control this behavior.  If
 > we do need to go this route then I'd like to standardize on either a
 > naming convention or maybe a separate option like
 >
 > set CYGWIN=fsaccess:noacl,file_cache

All the features in this patch (except for the "noacl") do not require any 
configuration, since there is no 'loss of behavior' or 'loss of correctness'. 
st_ino, st_nlink behave as before. Symlink and executable script detection 
behave as before (just faster...).

Yoni is preparing a patch to submit that will not include the noacl feature, and 
thus will not include any CYGWIN env related stuff.

Derry