tree 08012d22b81dc36e4d8f3262f62654b564ec40cb
parent f596018de7b94eb1907fb19b1beb94dc46ffe2b5
author Maxim Dounin <mdounin@mdounin.ru> 1478182229 +0300
committer Maxim Dounin <mdounin@mdounin.ru> 1478182229 +0300

Cache: prefix-based temporary files.

On Linux, the rename syscall can be slow due to a global file system lock,
acquired for the entire rename operation, unless both old and new files are
in the same directory.  To address this temporary files are now created
in the same directory as the expected resulting cache file when using the
"use_temp_path=off" parameter.

This change mostly reverts 99639bfdfa2a and 3281de8142f5, restoring the
behaviour as of a9138c35120d (with minor changes).