[SciPy-Dev] Boost for stats

[Nicholas McKibben]

Adding the following options to the .gitmodules file was also useful for
speeding up routine git commands:
    active = false
    ignore = true
    shallow = true

I am not sure if all of them are necessary - I don't profess to be a git
wizard. I still had commands such as 'git add -u' hang.

Indeed --recurse-submodules is necessary (and might be why the CI is
currently failing for the the PR).

Thanks,
Nicholas


On Mon, Feb 22, 2021, 04:23 Hans Dembinski <hans.dembinski at gmail.com> wrote:

> Hi,
>
> > On 22. Feb 2021, at 10:35, Ralf Gommers <ralf.gommers at gmail.com> wrote:
> >
> > Ouch, that's a lot slower than I expected. I'm not sure I understand it
> though, there should be no `git status` churn at all (unless the build
> process messes with files in-place?) and it's faster than cloning our own
> repo:
> >
> > $ time git clone git at github.com:boostorg/boost.git
> > Cloning into 'boost'...
> > remote: Enumerating objects: 15, done.
> > remote: Counting objects: 100% (15/15), done.
> > remote: Compressing objects: 100% (11/11), done.
> > remote: Total 254626 (delta 8), reused 11 (delta 4), pack-reused 254611
> > Receiving objects: 100% (254626/254626), 62.02 MiB | 7.47 MiB/s, done.
> > Resolving deltas: 100% (163071/163071), done.
> >
> > real 0m12.221s
> > user 0m5.959s
> > sys 0m2.725s
>
> because of the a long-term goal to make boost more modular, cloning
> boostorg/boost like this only clones the so called superproject of Boost,
> which indeed very small. It consists itself of many submodules with the
> individual Boost libraries, like Boost.Math etc, which live in separate
> repositories. If you do
>
> git clone --recurse-submodules git at github.com:boostorg/boost.git
>
> instead, you will see the long delay. Fetching all the submodules indeed
> takes a lot of time, unfortunately. The main Boost repo includes 157
> submodules.
>
> Best regards,
> Hans
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