Feature #13951
Updated by nobu (Nobuyoshi Nakada) over 6 years ago
``` rename(2) requires two pathname resolution operations which can take considerable time on slow filesystems, release the GVL so operations on other threads may proceed. On fast, local filesystems, this change results in some slowdown as shown by the new benchmark. I consider the performance trade off acceptable as cases are avoided. ``` benchmark results: minimum results in each 3 measurements. Execution time (sec) name trunk built file_rename 2.648 2.804 Speedup ratio: compare with the result of `trunk' (greater is better) name built file_rename 0.944 ``` * file.c (no_gvl_rename): new function (rb_file_s_rename): release GVL for renames * benchmark/bm_file_rename.rb: new benchmark I will commit this next week as well as work on releasing GVL for other operations where slow FS can have pathological slowdown (unlink, link, symlink, readlink, readdir, mkdir, chmod, ...) ```