JSON gem optimization
By the way, if you got some realistic benchmarks in which JSON.dump is significantly slower than an alternative gem, please let me know.
As long as it's not the result of the alternative doing something incorrect, I'll consider it as a bug.
バッファにコピーしてエスケープを解除し、そのバッファを最終文字列にコピーするのではなく、最終文字列に直接コピーすることができる
2.8.0
JSON.parse と JSON.loadが最大1.7倍