perf: speed up UTF-16 source copies - #122
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On Node 24.20.0, the eight-file corpus improves from 13,921.11 to 10,368.47 µs per sweep. The corpus contains 3,629,072 UTF-16 code units, with seven trials excluding the best and worst results. A 128-code-unit cutoff preserves the loop where Buffer setup regresses supported older runtimes.
On Node.js 22.23.1 with V8 12.4.254.21-node.56, parsing the eight-file sample corpus improved from 15,122 to 11,180 μs per sweep and from 15,093 to 11,184 μs in a fresh process.
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August 31, 2026 14:12
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On Node 24.20.0 (V8 13.6), an eight-file corpus improves from 13,921.11 to 10,368.47 µs per sweep. The corpus contains 3,629,072 UTF-16 code units.
A 128-code-unit cutoff preserves the loop where Buffer setup regresses supported older runtimes.