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Dair Grant 8262574822 git-svn: improve rebase/mkdirs performance
Processing empty_dir directives becomes extremely slow for svn
repositories with a large enough history.

This is due to using a single hash to store the list of empty
directories, with the expensive step being purging items from
that hash using grep+delete.

Storing directories in a hash of hashes improves the performance
of this purge step and removes a potentially lengthy delay after
every rebase/mkdirs command.

The svn repository with this behaviour has 110K commits with
unhandled.log containing 170K empty_dir directives.

This takes 10 minutes to process when using a single hash, vs
3 seconds with a hash of hashes.

Signed-off-by: Dair Grant <dair@feralinteractive.com>
Signed-off-by: Eric Wong <normalperson@yhbt.net>
2015-11-10 01:35:01 +00:00
..
Git git-svn: improve rebase/mkdirs performance 2015-11-10 01:35:01 +00:00
.gitignore perl: detect new files in MakeMaker builds 2012-07-27 22:14:02 +00:00
Git.pm send-email: reduce dependencies impact on parse_address_line 2015-07-07 14:38:20 -07:00
Makefile Extract Git::SVN::GlobSpec from git-svn. 2012-07-27 22:36:19 +00:00
Makefile.PL The Makefile.PL will now find .pm files itself. 2012-07-27 22:13:28 +00:00
private-Error.pm Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00