Eli Zaretskii wrote:
Date: Fri, 08 Dec 2006 21:46:18 -0500
From: Bill Hoffman <[EMAIL PROTECTED]>
So, the windows native stat is about 3 X faster.
This is not really a valid conclusion: `stat' does much more than just
get the file's attributes via a single Win32 API call. And Make does
use the result of the other API calls, such as st_ino, st_dev, and
st_mode, for example.
Since nmake is performing about 2X faster than gmake, the likely culprit
is stat.
This all started because a cmake user was trying to switch from nmake to
gmake,
and found it so much slower, then I remembered the change we made in cmake.
stat does do more, but I would assume that make is mostly interested in
comparing
file modification times, and ignores the rest of those values.
I will poke around in the gmake sources and try to figure out if I can
replace some
of the stat calls. It looks like I can just change name_mtime in
remake.c it uses
st_mode in one place but only to check for symlinks. I could maybe have
a fast mtime
if check_symlink_flag is not set, in that case only the file time is
used. One issue is that
FILE_TIMESTAMP is a uintmax_t and the windows call uses __int64 for the
time stamp.
-Bill
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