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⚡ Optimize ShareableMap defragmentation copy loop #46

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⚡ Optimize ShareableMap defragmentation copy loop #46

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6 changes: 3 additions & 3 deletions src/map/ShareableMap.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -535,6 +535,8 @@ export class ShareableMap<K, V> extends TransferableDataStructure {
private defragment() {
const newData: ArrayBuffer = new ArrayBuffer(this.dataView.byteLength);
const newView = new DataView(newData);
const newUint8Array = new Uint8Array(newData);
const oldUint8Array = new Uint8Array(this.dataMem);

let newOffset = ShareableMap.INITIAL_DATA_OFFSET;

Expand All @@ -550,9 +552,7 @@ export class ShareableMap<K, V> extends TransferableDataStructure {

const totalLength = keyLength + valueLength + ShareableMap.DATA_OBJECT_OFFSET;

for (let i = 0; i < totalLength; i++) {
newView.setUint8(newOffset + i, this.dataView.getUint8(dataPointer + i));
}
newUint8Array.set(oldUint8Array.subarray(dataPointer, dataPointer + totalLength), newOffset);

// Pointer to next block is zero
newView.setUint32(newOffset, 0);
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