Re: [PATCH] Add the --submodule-summary option to the diff option family

> Hi,
> 
> On Tue, 6 Oct 2009, Junio C Hamano wrote:
> 
>> Jens Lehmann <Jens.Lehmann@web.de> writes:
>>
>>>> But I really, really, really want to avoid a fork() in the common case.  I 
>>>> do have some users on Windows, and I do have a few submodules in that 
>>>> project.  Having too many fork() calls there would just give Git a bad 
>>>> reputation.  And it has enough of that, it does not need more.
>>> Me too thinks performance matters here. We do have a repo at my dayjob
>>> with more than a handful of submodules and its main target platform is
>>> windows ... so having that perform nicely is a win for us.
>> Numbers?
>>
>> I'd prefer to avoid kludges that favors unsubstantiated performance
>> argument over correctness.
> 
> Well, having worked with msysGit for such a long time, I just _know_ that 
> a subprocess costs a substantial amount of time.
> 
> But as you don't trust my words, maybe Jens could be so kind as to perform 
> some benchmarks?  I am short on Git time budget, but I will make a commit 
> on my submodule-summary branch that allows to start a subprocess always.