The story of a V8 performance cliff in React · V8

Show navigation Previously, we discussed how JavaScript engines optimize object and array access through the use of Shapes and Inline Caches, and we’ve explored how engines speed up prototype property access in particular. This article describes how V8 chooses optimal in-memory representations for various JavaScript values, and how that impacts the shape machinery — all of which helps explain a re

[efcl]

オブジェクトの初期値の最適化

[apple19940820]

面白いしわかりやすい

[tofu-kun]

丁寧に解説されてる。そして typeof は嘘つき