tree 785069e8a9a584f67dbb66c2fb34e3c64591dcd8
parent 4db2394156b408e7af5c595bf3c9cbff8ba21157
parent f0d3df39cbe1a3afaaabddbc5764b4057c713dd5
author bors <bors@rust-lang.org> 1548001467 +0000
committer bors <bors@rust-lang.org> 1548001467 +0000

Auto merge of #57697 - dotdash:fast_lex_reg_resol_item_bodies, r=nagisa

Use a faster early exit during region expansion

Turns out that the equality check for regions is rather expensive, and
the current early exit check works in such a way, that the comparison is
even done twice. As we only really care about the case of equal scopes,
we can perform a faster, more specialized check and move it up one
level, so we can eventually skip the additional full comparison as well.