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Improve performance #13376

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merged 2 commits into from May 27, 2021
Merged

Improve performance #13376

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aa39663
Improve performance
sokra May 26, 2021
1c1f898
use const variable
sokra May 26, 2021
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10 changes: 8 additions & 2 deletions packages/babel-plugin-transform-block-scoping/src/index.js
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Expand Up @@ -750,7 +750,7 @@ class BlockScoping {
getLetReferences() {
const block = this.block;

let declarators = [];
const declarators = [];

if (this.loop) {
const init = this.loop.left || this.loop.init;
Expand All @@ -773,7 +773,13 @@ class BlockScoping {
if (isBlockScoped(node)) {
convertBlockScopedToVar(path, node, block, this.scope);
}
declarators = declarators.concat(node.declarations || node);
if (node.declarations) {
for (let i = 0; i < node.declarations.length; i++) {
declarators.push(node.declarations[i]);
}
} else {
declarators.push(node);
}
}
if (t.isLabeledStatement(node)) {
addDeclarationsFromChild(path.get("body"), node.body);
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