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fs: improve error performance of `opendirSync`

Rodrigo Muino Tomonari requested to merge github/fork/anonrig/improve-fs-opendirSync into main 
fs/bench-opendirSync.js n=10000 bufferSize=128 type='existing'                    -0.15 %       ±1.56%  ±2.08%  ±2.71%
fs/bench-opendirSync.js n=10000 bufferSize=128 type='non-existing'        ***    109.56 %       ±3.93%  ±5.23%  ±6.81%
fs/bench-opendirSync.js n=10000 bufferSize=32 type='existing'                     -0.34 %       ±1.95%  ±2.60%  ±3.39%
fs/bench-opendirSync.js n=10000 bufferSize=32 type='non-existing'         ***    111.68 %       ±3.03%  ±4.03%  ±5.25%
fs/bench-opendirSync.js n=10000 bufferSize=4 type='existing'                      -1.19 %       ±1.44%  ±1.92%  ±2.51%
fs/bench-opendirSync.js n=10000 bufferSize=4 type='non-existing'          ***    104.85 %       ±8.18% ±11.01% ±14.59%

Ref: https://github.com/nodejs/performance/issues/106

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