Stat for ".svn" before statting ".svn/wc.db" and ".svn/entries" for an uncached directory in a working copy. For any directory except the working copy root this will return that this directory does not exist and avoid the two further stats.
This reduces the time to run svn status on the root of my semi-network working copy with Subversion trunk, branches: 1.5.x, 1.6.x and 1.7.x by about 20-30%. (semi network = VM to host system using network protocols over virtual NIC)
* subversion/libsvn_wc/wc_db_wcroot.c (svn_wc__db_wcroot_parse_local_abspath): Use a filestat on ".svn" to avoid further filestats.