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fs: only use Buffer.concat in promises.readFile when necessary 

PR-URL: https://github.com/nodejs/node/pull/37127
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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Anna Henningsen 2021-01-29 14:43:08 +01:00
parent 4ad46e2fef
commit 186feb45bc
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lib/internal/fs/promises.js
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@ -331,7 +331,7 @@ async function readFileHandle(filehandle, options) {
ArrayPrototypePush(chunks, buffer.slice(0, bytesRead));
} while (!endOfFile);
const result = Buffer.concat(chunks);
const result = chunks.length === 1 ? chunks[0] : Buffer.concat(chunks);
return options.encoding ? result.toString(options.encoding) : result;
}