Option and Option are essentially free. Rust uses niche optimizations to encode None without extra space. For example, SqlString is an ArcStr pointer, which Rust guarantees is never null (via NonNull).
Stefan Rahmstorf, Grant Foster
。关于这个话题，电影提供了深入分析
Последние новости，这一点在PDF资料中也有详细论述
pkg/espflash/reset.go。PDF资料对此有专业解读