Re: [RFC] building postgres with meson

From: Andres Freund <andres(at)anarazel(dot)de>
To: pgsql-hackers(at)postgresql(dot)org
Cc: John Naylor <john(dot)naylor(at)enterprisedb(dot)com>
Subject: Re: [RFC] building postgres with meson
Date: 2022-03-09 17:13:14
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On 2021-10-12 02:08:29 -0700, Andres Freund wrote:
> A very helpful visualization is to transform ninja's build logs into a
> tracefile with
> I attached an example - the trace.json.gz can be uploaded as-is to

These days perfetto can load .ninja_log directly without conversion. Attached
is an example of the output. Also attached a local .ninja_log to upload if
somebody wants to look at the interactive output without building.

> It's quite a bit of of fun to look at imo.
> There's a few other things quickly apparent:
> - genbki prevents build progress due to dependencies on the generated
> headers.

That's still the biggest "slowdown". Only a small number of things can start
before genbki is done. Parts of pgport, bison/flex and parts of the docs

> - the absolutely stupid way I implemented the python2->python3
> regression test output conversion uses up a fair bit of resources

That's gone now.

> - tablecmds.c, pg_dump.c, xlog.c and a few other files are starting to
> big enough to be problematic compile-time wise

But these are still present. When building just the backend, the build speed
is limited by gram.y->gram.c, gram.c -> gram.o, linking postgres.


Andres Freund

Attachment Content-Type Size
build-log.png image/png 1002.2 KB
.ninja_log text/plain 150.2 KB

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