A Tour of Inline Caching with Delete

If you search for any JavaScript performance advice, a very popular recommendation is to avoid the delete operator. Today, this seems to be good advice, but why should it be vastly more expensive to delete a property than to add it? The goal of my internship at Apple this winter was to improve the performance of the delete operator in JavaScriptCore. This has given me the opportunity to learn abou

[efcl]

`delete`演算子でプロパティを削除するオブジェクトの構造が変わって構造IDが変わることで、構造IDをkeyにしてキャッシュするInline Cachingが無効化されて遅くなる問題について。 JSCではこのdeleteによる削除遷移に対する最適化

[yosuke_furukawa]

delete を使ったときにinline cacheがどうなるかについての話。面白い