Re: [PATCH 0/7] Add a new --remerge-diff capability to show & log

On 31/08/21 09.26, Elijah Newren via GitGitGadget wrote:

Here are some patches to add a --remerge-diff capability to show & log,
which works by comparing merge commits to an automatic remerge (note that
the automatic remerge tree can contain files with conflict markers).

Here are some example commits you can try this out on (with git show
--remerge-diff $COMMIT):

  * git.git conflicted merge: 07601b5b36
  * git.git non-conflicted change: bf04590ecd
  * linux.git conflicted merge: eab3540562fb
  * linux.git non-conflicted change: 223cea6a4f05

<snip>...

In regards to the performance point above, the timing for running the
following command:

time git log --min-parents=2 --max-parents=2 $DIFF_FLAG | wc -l


in linux.git (with v5.4 checked out, since my copy of linux is very out of
date) is as follows:

DIFF_FLAG=--cc:            71m 31.536s
DIFF_FLAG=--remerge-diff:  31m  3.170s


Note that there are 62476 merges in this history. Also, output size is:

DIFF_FLAG=--cc:            2169111 lines
DIFF_FLAG=--remerge-diff:  2458020 lines

Which repo did you mean by linux.git? Kernel developers often work 
against Linus' mainline tree [1], while end-users (including myself) 
prefer stable tree (which is mainline + stable release branches and 
tags) [2].

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

-- 
An old man doll... just what I always wanted! - Clara