| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com> |
| Cc: | Alexander Lakhin <exclusion(at)gmail(dot)com>, Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Subject: | Re: Speed up clean meson builds by ~25% |
| Date: | 2024-04-09 05:01:00 |
| Message-ID: | ZhTLjP9zP_9YVcWc@paquier.xyz |
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| Lists: | pgsql-hackers |
On Mon, Apr 08, 2024 at 12:23:56PM +0300, Nazir Bilal Yavuz wrote:
> On Mon, 8 Apr 2024 at 11:00, Alexander Lakhin <exclusion(at)gmail(dot)com> wrote:
>> As I wrote in [1], I didn't observe the issue with clang-18, so maybe it
>> is fixed already.
>> Perhaps it's worth rechecking...
>>
>> [1] https://www.postgresql.org/message-id/d2bf3727-bae4-3aee-65f6-caec2c4ebaa8%40gmail.com
>
> I had this problem on my local computer. My build times are:
>
> gcc: 20s
> clang-15: 24s
> clang-16: 105s
> clang-17: 111s
> clang-18: 25s
Interesting. A parallel build of ecpg shows similar numbers here:
clang-16: 101s
clang-17: 112s
clang-18: 14s
gcc: 10s
Most of the time is still spent on preproc.c with clang-18, but that's
much, much faster (default version of clang is 16 on Debian GID where
I've run these numbers).
--
Michael
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