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Re: Building the web site is slow
From: |
pelzflorian (Florian Pelz) |
Subject: |
Re: Building the web site is slow |
Date: |
Tue, 24 Nov 2020 21:27:19 +0100 |
OK, I now believe `haunt build` is what costs the time.
On Mon, Nov 23, 2020 at 11:46:08PM +0100, pelzflorian (Florian Pelz) wrote:
> Anyway, I am not sure the `haunt build` runs are the culprit. If it
> is a problem with spinning disks only, maybe .guix.scm can be made to
> copy less from the same disk to the same disk but copy more from disk
> to a file system in RAM and from a file system in RAM to disk.
Negative, unless I misunderstood what /dev/shm is. I did `time guix
build -f .guix.scm`:
real 7m3.909s
user 1m3.639s
sys 0m0.841s
Instead of `time` I now enclosed most of the build procedure in
(statprof (lambda () …))
% cumulative self
time seconds seconds procedure
18.62 2.13 2.11 ice-9/boot-9.scm:1738:4:throw
14.81 1.68 1.68 display
14.22 1.61 1.61 copy-file
8.36 0.95 0.95 readdir
6.89 0.78 0.78 mkdir
4.11 0.47 0.47 opendir
3.96 0.47 0.45 lstat
2.20 0.25 0.25 ice-9/boot-9.scm:1202:6
1.91 4.83 0.22 ice-9/boot-9.scm:1673:4:with-exception-handler
1.91 0.22 0.22 string-append
I added at the beginning of the build procedure:
(let ((where "/dev/shm/website-construction-site"))
(mkdir-p where)
(chdir where))
Now I get
real 7m4.632s
user 1m4.254s
sys 0m0.744s
% cumulative self
time seconds seconds procedure
17.66 2.06 2.06 copy-file
17.52 2.07 2.04 ice-9/boot-9.scm:1738:4:throw
9.97 1.16 1.16 display
8.40 0.98 0.98 mkdir
8.26 0.98 0.96 readdir
5.41 0.63 0.63 opendir
3.85 0.46 0.45 lstat
2.71 5.57 0.32 ice-9/boot-9.scm:1673:4:with-exception-handler
2.14 0.25 0.25 string-append
I will instead try profiling haunt runs again.
Regards,
Florian