You should be looking for any single script execution that takes 100ms or longer on any given browser; those methods involved with such a long execution should be evaluated for performance issues.
你应该毫不犹豫地将那些执行时间超过100毫秒的脚本找出来,哪怕这些脚本只是在某些浏览器上运行不畅,这些脚本包含了一些需要执行很长时间的代码段,而这些代码应该通过性能检测工具进行重新评估。
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