Re: git slow unless piped to cat

From: SZEDER Gábor <szeder.dev@gmail.com>
Date: Aug 27, 2019, 08:41 UTC
Message-ID: <20190827084111.GU20404@szeder.dev>
In-Reply-To: <20190827081559.mt5wjpdvqzn62dib@pengutronix.de>

On Tue, Aug 27, 2019 at 10:15:59AM +0200, Uwe Kleine-König wrote:

Show 21 quoted lines

> I have a problem here with git being slow in some situations.
> Using git 2.23.0 (from Debian) the effect is:
> 
> ukl@dude.ptx:/ptx/src/git/linux.git$ sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"; time git show v5.2
> tag v5.2
> ...
> 
> real	0m12.727s
> user	0m0.300s
> sys	0m0.371s
> 
> But to get the actual data isn't the problem:
> 
> ukl@dude.ptx:/ptx/src/git/linux.git$ sudo sh -c "echo 3 > /proc/sys/vm/drop_caches"; time git show v5.2 | cat
> tag v5.2
> ...
> 
> real	0m0.764s
> user	0m0.014s
> sys	0m0.020s
>

How does 'git --no-pager show v5.2' perform? If it's as fast as the case piping the output to cat, then look into what pager and pager options you use.