Re: [libgpiod][WIP PATCH 0/2] Convert the build from autotools to meson

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Mon, Dec 05, 2022 at 07:55:29PM +0100, Bartosz Golaszewski wrote:
> On Mon, Dec 5, 2022 at 2:22 PM Andrew Jeffery <andrew@xxxxxxxx> wrote:

...

> > Meson defaults to using ninja as its backend, and automatically exploits
> > ccache[2] when available to keep repeated builds speedy.

...which is a bad idea for a clean build.

> It does show! Full rebuild with autotools:
> 
> real 0m43,902s
> user 2m40,010s
> sys 0m20,172s
> 
> Full rebuild with meson:
> 
> real 0m10,001s
> user 1m1,334s
> sys 0m12,205s
> 
> More than 4x faster now.

And risk to have a badly formed binaries (yes, very little risk, but > 0).

> > [2] https://ccache.dev/

ccache has downside of its own use. If we have a common storage for ccache --
the collision is just matter of time (yes, have seen that in real life).

OTOH requiring per-project ccache storage makes a little sense for the end user
as they quite likely won't rebuild it many times.

-- 
With Best Regards,
Andy Shevchenko