Horton

Re: Performance improvements for src/port/snprintf.c

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andres Freund <andres@anarazel.de>, pgsql-hackers@lists.postgresql.org, Thomas Munro <thomas.munro@enterprisedb.com>, Andrew Gierth <andrew@tao11.riddles.org.uk>, Alexander Kuzmenkov <a.kuzmenkov@postgrespro.ru>
Date: 2018-10-03T18:11:15Z
Lists: pgsql-hackers 
On 2018-Oct-03, Tom Lane wrote:

> Andres Freund <andres@anarazel.de> writes:

> BTW, so far as I can tell on F28, strfromd isn't exposed without
> "-D__STDC_WANT_IEC_60559_BFP_EXT__", which seems fairly scary;
> what else does that affect?

https://en.cppreference.com/w/c/experimental/fpext1

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Improve snprintf.c's handling of NaN, Infinity, and minus zero.

  2. Rationalize snprintf.c's handling of "ll" formats.

  3. Provide fast path in snprintf.c for conversion specs that are just "%s".

  4. Make assorted performance improvements in snprintf.c.

  5. Set snprintf.c's maximum number of NL arguments to be 31.

  6. Always use our own versions of *printf().