improve transversal efficiency in `collapse_vars` (#2611)
authorAlex Lam S.L <alexlamsl@gmail.com>
Sun, 17 Dec 2017 19:00:05 +0000 (03:00 +0800)
committerGitHub <noreply@github.com>
Sun, 17 Dec 2017 19:00:05 +0000 (03:00 +0800)
commitb29fc8b27c7bf4f48ff354ea2b9d55f7f4b69f79
tree0852628060e5cfcf77ff223c6e2d0094f8a3b1ba
parent5de369fa67059efe694700513b66bf473fd98e06
improve transversal efficiency in `collapse_vars` (#2611)

fixes #2603
lib/compress.js
test/compress/collapse_vars.js