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help v8 hashing the bigint #14469

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merged 1 commit into from Oct 13, 2021
Merged

help v8 hashing the bigint #14469

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11 changes: 8 additions & 3 deletions lib/optimize/SplitChunksPlugin.js
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Expand Up @@ -774,9 +774,13 @@ module.exports = class SplitChunksPlugin {
const chunkIndexMap = new Map();
const ZERO = BigInt("0");
const ONE = BigInt("1");
let index = ONE;
const START = ONE << BigInt("31");
let index = START;
for (const chunk of chunks) {
chunkIndexMap.set(chunk, index);
chunkIndexMap.set(
chunk,
index | BigInt((Math.random() * 0x7fffffff) | 0)
);
index = index << ONE;
}
/**
Expand All @@ -793,7 +797,8 @@ module.exports = class SplitChunksPlugin {
let key =
chunkIndexMap.get(first) | chunkIndexMap.get(result.value);
while (!(result = iterator.next()).done) {
key = key | chunkIndexMap.get(result.value);
const raw = chunkIndexMap.get(result.value);
key = key ^ raw;
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Just curious, why using xor here?

}
return key;
};
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