Re: [PATCH] coccicheck: process every source file at once

> On Tue, Oct 02, 2018 at 03:55:19PM -0400, Jeff King wrote:
> > On Tue, Oct 02, 2018 at 12:16:42PM -0700, Jacob Keller wrote:
> > 
> > > make coccicheck is used in order to apply coccinelle semantic patches,
> > > and see if any of the transformations found within contrib/coccinelle/
> > > can be applied to the current code base.
> > > 
> > > Pass every file to a single invocation of spatch, instead of running
> > > spatch once per source file.
> > > 
> > > This reduces the time required to run make coccicheck by a significant
> > > amount of time:
> > > 
> > > Prior timing of make coccicheck
> > >   real    6m14.090s
> > >   user    25m2.606s
> > >   sys     1m22.919s
> > > 
> > > New timing of make coccicheck
> > >   real    1m36.580s
> > >   user    7m55.933s
> > >   sys     0m18.219s
> > 
> > Yay! This is a nice result.
> > 
> > It's also one of the things that Julia suggested in an earlier thread.
> > One thing I wasn't quite sure about after digging into the various
> > versions (1.0.4 on Debian stable/unstable, 1.0.6 in experimental, and
> > pre-1.0.7 at the bleeding edge) was whether the old versions would be
> > similarly helped (or work at all).
> > 
> > I just replicated your results with 1.0.4.deb-3+b2 from Debian stable.
> > It's possible there are older versions floating around, but for
> > something developer-only like this, I think "in Debian stable" is a
> > reasonable enough cutoff.
> 
> Linux build jobs on Travis CI run Ubuntu Trusty 14.04 LTS, and
> therefore our static analysis build job still runs 1.0.0~rc19.deb-3.
> 
> This patch appears to work fine with that version, too,