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What
arr.sort
はマージソートで実装されており、分割した左右のソートを順番に実行しているが、これを非同期的に実行するようにした。結果:
arr.sort
が高速化される。8531ms -> 1858ms (Codespaces上で実行)
Why
結構速くなる
Additional info (optional)
比較関数に副作用等がある場合に結果が変わる可能性がある。(そういうコードを書く人がいるかは不明)