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Nathan Bossart dc3f9bc549 Micro-optimize JSONTYPE_NUMERIC code path in json.c. ... This commit does the following: * In datum_to_json_internal(), the call to IsValidJsonNumber() is replaced with simplified validation code. This avoids an extra call to strlen() in this path, and it avoids validating the entire string (which is okay since we know we're dealing with a numeric data type's output). * In datum_to_json_internal(), the call to escape_json() in the JSONTYPE_NUMERIC path is replaced with code that just surrounds the string with quotes. In passing, some other nearby calls to appendStringInfo() have been replaced with similar code to avoid unnecessary calls to vsnprintf(). * In composite_to_json(), the length of the separator is now determined at compile time to avoid unnecessary calls to strlen(). On my machine, this speeds up a benchmark for the proposed COPY TO (FORMAT json) command with many integers by upwards of 20%. There are likely other code paths that could be given a similar treatment, but that is left as a future exercise. Reviewed-by: Jeff Davis, Tom Lane, David Rowley, John Naylor Discussion: https://postgr.es/m/20231207231251.GB3359478%40nathanxps13		2 years ago
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backend	Micro-optimize JSONTYPE_NUMERIC code path in json.c.	2 years ago
bin	Fix path of regress shared library in pg_upgrade test	2 years ago
common	Shrink Unicode category table.	2 years ago
fe_utils	Remove unneeded assignments in for loop header	2 years ago
include	Cache opaque handle for GUC option to avoid repeasted lookups.	2 years ago
interfaces	Fix handling of errors in libpq pipelines	2 years ago
makefiles	Remove distprep	2 years ago
pl	Don't specify number of dimensions in cases where we don't know it.	2 years ago
port	Optimize pg_readv/pg_pwritev single vector case.	2 years ago
template	…
test	Optimize nbtree backward scan boundary cases.	2 years ago
timezone	Remove distprep	2 years ago
tools	Cache opaque handle for GUC option to avoid repeasted lookups.	2 years ago
tutorial	Pre-beta mechanical code beautification.	3 years ago
.gitignore	…
DEVELOPERS	…
Makefile	Remove distprep	2 years ago
Makefile.global.in	Don't clean initdb files on template creation failure	2 years ago
Makefile.shlib	Stop using "-multiply_defined suppress" on macOS.	2 years ago
meson.build	…
nls-global.mk	Remove distprep	2 years ago