[bug #17372] fts-based find very slow on NFS

[James Youngman]

Follow-up Comment #1, bug #17372 (project findutils):

It could just be that -depth is wrongly implemented in ftsfind.c:-

$ for find in /usr/bin/find find oldfind-dev find-dev ; do echo; echo $find :
 $( $find --version | sed -e 1q); strace -e lstat64  $find    /tmp/X -maxdepth
1  -perm 0 -false -print ; done ; echo ; echo Layout:; find /tmp/X

/usr/bin/find : GNU find version 4.1.20
lstat64(".", {st_mode=S_IFDIR|0711, st_size=32768, ...}) = 0
lstat64("/tmp/X", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64(".", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64(".", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64(".", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("Y", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0

find : GNU find version 4.2.29-CVS
lstat64(".", {st_mode=S_IFDIR|0711, st_size=32768, ...}) = 0
lstat64("X", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("Y", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0

oldfind-dev : GNU find version 4.3.2-CVS
lstat64(".", {st_mode=S_IFDIR|0711, st_size=32768, ...}) = 0
lstat64("X", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("Y", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0

find-dev : GNU find version 4.3.2-CVS
lstat64("/tmp/X", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("Y", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("Z", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("ZZ", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("ZZZ", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0
lstat64("q", {st_mode=S_IFDIR|0750, st_size=4096, ...}) = 0

Layout:
/tmp/X
/tmp/X/Y
/tmp/X/Y/Z
/tmp/X/Y/Z/P
/tmp/X/Y/ZZ
/tmp/X/Y/ZZZ
/tmp/X/Y/q


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