cerxes/babel
3
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

perf: Optimize regex

Browse Source 
This saves some steps, as the regex parser does not have to backtrack for character classes, but is has to for alternates
This commit is contained in:
Daniel Tschinder 2019-01-15 23:30:46 -08:00
parent 49f7bcf271
commit 455e003567
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
packages/babel-parser/src/util/whitespace.js
View File

@ -4,7 +4,7 @@ import * as charCodes from "charcodes";
// Matches a whole line break (where CRLF is considered a single
// line break). Used to count lines.
export const lineBreak = /\r\n?|\n|\u2028|\u2029/;
export const lineBreak = /\r\n?|[\n\u2028\u2029]/;
export const lineBreakG = new RegExp(lineBreak.source, "g");
// https://tc39.github.io/ecma262/#sec-line-terminators