javascript - Front-end performance optimization, how to locate the blank time between timeLine resources?

Question

I just came into contact with the front-end optimization of a project. When I looked at timeLine in Google Developer Tools, I found that there was a blank space between two resources, as shown in the picture. I don’t know what caused it. How to locate & optimize it?

.]

ringa_lee · Answer

Need to confirm, is the first line in the red box a js file?

phpcn_u1582 · Answer

May I ask where the poster’s timeline is? Why can't I find the console?