On the fsfs-format7 branch:   Minimize OS interaction and eliminate
double buffering in stringbuf_from_aprfile() in case the file size
is known.  I.e. don't attempt to read beyond EOF just to detect EOF etc.

* subversion/libsvn_subr/io.c
  (stringbuf_from_aprfile): use a single read request if filesize is known

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1446103 13f79535-47bb-0310-9956-ffa450edef68