jsdw/parse-rosetta-rs

Comparing parser APIs

Rust Parsing Benchmarks

This repo tries to assess Rust parsing performance.

crate	parser type	action code	integration	input type	precedence climbing	parameterized rules	streaming input
chumsky	combinators	in source	library	&str	?	?	?
combine	combiantors	in source	library	&str	?	?	?
lalrpop	LR(1)	in grammar	build script	&str	No	Yes	No
nom	combinators	in source	library	&[u8], custom	No	Yes	Yes
peg	PEG	in grammar	proc macro (block)	&str, &[T], custom	Yes	Yes	No
pest	PEG	external	proc macro (file)	&str	Yes	No	No
pom	combiantors	in source	library	&str	?	?	?
winnow	combinators	in source	library	&str, &[T], custom	No	Yes	Yes

Results

Name	Overhead (release)	Build (debug)	Parse (release)	Downloads	Version
null	0 KiB	391ms	22ms	-	-
chumsky	773 KiB	8s	1s		v0.1.5
combine	228 KiB	5s	867ms		v3.8.1
nom	161 KiB	2s	848ms		v7.1.3
peg	29 KiB	2s	invalid		v0.8.1
pest	143 KiB	5s	757ms		v2.5.5
pom	215 KiB	890ms	2s		v3.2.0
winnow	143 KiB	2s	747ms		v0.3.0

System: Linux 5.4.0-104-generic (x86_64) w/ -j 8

Note:

• For more "Parse (release)" comparisons, see parser_benchmarks
• Parsers have not been validated and might have differing levels of quality (#5)

Running the Benchmarks

$ ./bench.py
$ ./format.py