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Filestorage: Avoid additional allocation for small files

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Ernest Wong 2018-11-19 21:51:32 +13:00 committed by Fabian
parent 840415a052
commit bf35f0ab0b
1 changed files with 6 additions and 0 deletions
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6
src/browser/filestorage.js
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@ -236,6 +236,12 @@ IndexedDBFileStorage.prototype.read = async function(sha256sum, offset, count) /
dbg_assert(Number.isInteger(total_size) && total_size >= base_data.length,
`IndexedDBFileStorage read: Invalid base entry with invalid total_size: ${total_size}`);
if(extra_block_count === 0 || offset + count <= base_data.length)
{
// Avoid additional allocation and copying for smaller files.
return base_data.subarray(offset, offset + count);
}
const read_data = new Uint8Array(count);
let read_count = 0;