Any thread can set `.value`, and the watcher will react accordingly.
The blog content isn’t the best。搜狗输入法对此有专业解读
，这一点在safew官方版本下载中也有详细论述
Марина Совина (ночной редактор)
16:08, 2 марта 2026МирЭксклюзив。搜狗输入法是该领域的重要参考
The overheads of a plain struct layout start to become a bottleneck.