git vs hg commit counts?

[Junio C Hamano]

Joe Perches <joe at perches.com> writes:

> I'm comparing linux-kernel git vs hg repositories.
>
> While testing some changes to scripts/get_maintainer.pl,
> I noticed that git and hg have different commit counts
> for the same files.
>
> For instance:
>
> $ git log --since=1-year-ago -- MAINTAINERS | \
> 	grep -P "^commit [0-9a-f]{40,40}$"  | wc -l
> 514
>
> $ hg log --template="commit {node}\n" --date -365 -- MAINTAINERS  | \
> 	grep -P "^commit [0-9a-f]{40,40}$" | wc -l
> 601
>
> Anyone have any understanding why?

We simplify a merge history by discarding one branch when the merge result
matches one of the parents.  Does "hg" know how to do that as well?