php performance

strace huge lstat try:
php.ini


; ...
; Determines the size of the realpath cache to be used by PHP. This value should
; be increased on systems where PHP opens many files to reflect the quantity of
; the file operations performed.
realpath_cache_size=1M

; Duration of time, in seconds for which to cache realpath information for a given
; file or directory. For systems with rarely changing files, consider increasing this
; value.
realpath_cache_ttl=300
; ...