性能分析工具确保优化工作花费在系统中最慢，影响大多数浏览器的地方，而不是去判定那些函数或操作缓慢。

Rather than assuming which functions or operations are slow, profilers ensure that optimization time is spent on the slowest areas of the system that affect the most browsers.

youdao

性能分析工具确保优化工作花费在系统中最慢，影响大多数浏览器的地方，而不是去判定那些函数或操作缓慢。

Rather than assuming which functions or operations are slow, profilers ensure that optimization time is spent on the slowest areas of the system that affect the most browsers.

youdao