git.lizzy.rs Git - rust.git/commit

]> git.lizzy.rs Git - rust.git/commit

author	Markus Westerlind <markus.westerlind@imperva.com>
	Wed, 8 Jan 2020 22:13:56 +0000 (23:13 +0100)
committer	Markus Westerlind <markus.westerlind@imperva.com>
	Wed, 8 Jan 2020 22:20:19 +0000 (23:20 +0100)
commit	a5657dbc43d84133bd95e5de178d68634973b1b3
tree	cf9ea54d17d6109b06d9518a8944c38fd261c104	tree \| snapshot
parent	f48e576756cd0c360e5522974fc8d5867b439092	commit \| diff

perf: Avoid creating a SmallVec if nothing changes during a fold

Not sure if this helps but in theory it should be less work than what
the current micro optimization does for `ty::Predicate` lists.

(It would explain the overhead I am seeing from `perf`.)

src/librustc/ty/structural_impls.rs

diff | blob | history

Empowering everyone to build reliable and efficient software.

RSS Atom