| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Michael Paquier <michael(at)paquier(dot)xyz>, Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>, Alexander Lakhin <exclusion(at)gmail(dot)com>, Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Speed up clean meson builds by ~25% |
| Date: | 2024-04-10 05:03:09 |
| Message-ID: | 3940996.1712725389@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> On Wed, Apr 10, 2024 at 11:44 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> ... On my Mac laptop
>> (Apple clang version 15.0.0), the compile time for preproc.o went from
>> 6.7sec to 5.5sec.
> Having seen multi-minute compile times on FreeBSD (where clang is the
> system compiler) and Debian (where I get packages from apt.llvm.org),
> I have been quietly waiting for this issue to hit Mac users too (where
> a clang with unknown proprietary changes is the system compiler), but
> it never did. Huh.
I don't doubt that there are other clang versions where the problem
bites a lot harder. What result do you get from the test I tried
(turning mm_strdup into a no-op macro)?
regards, tom lane
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