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Merge pull request #2996 from ericvergnaud/fix-js-perf-issue-cause-by-incorrect-fix 

rollback partially incorrect fix for #2902
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ericvergnaud 2020-12-06 22:25:15 +08:00 committed by GitHub
parent 1b947ee74a 74b8bb780d
commit 0ad70569b2
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1 changed files with 1 additions and 1 deletions
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runtime/JavaScript/src/antlr4/PredictionContext.js
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@ -562,7 +562,7 @@ function mergeArrays(a, b, rootIsWildcard, mergeCache) {
while (i < a.returnStates.length && j < b.returnStates.length) {
const a_parent = a.parents[i];
const b_parent = b.parents[j];
if (equalArrays(a.returnStates[i], b.returnStates[j])) {
if (a.returnStates[i] === b.returnStates[j]) {
// same payload (stack tops are equal), must yield merged singleton
const payload = a.returnStates[i];
// $+$ = $