commit b0810c51c3f075cc8a309bfb3c1714ac42b0f020
author Roberto Ierusalimschy <roberto@inf.puc-rio.br> Thu Apr 11 11:29:16 2019 -0300
committer Roberto Ierusalimschy <roberto@inf.puc-rio.br> Thu Apr 11 11:29:16 2019 -0300
tree 8d9e58246f442f1fbec8bb14ffebb77bd40c3564
parent a93e0144479f1eb0ac19b8c31862f4cbc2fbe1c4

Small optimizations in 'string.gsub'

Avoid creating extra strings when possible:

- avoid creating new resulting string when subject was not modified
(instead, return the subject itself);

- avoid creating strings representing the captured substrings when
handling replacements like '%1' (instead, add the substring directly
to the buffer).