Chrome的跟踪事件分析工具中的自上而下（树），自上而下（重）和自下而上（重）有什么区别

Question

I am trying to use Google Chrome's Trace Event Profiling Tool to analyze a Node.js application I am running. Once I have selected a sample of points, I can choose between three views:

• Top-Down (Tree)
• Top-Down (Heavy)
• Bottom-Up (Heavy)

What are the differences between these views? What do they each represent? Which is the most useful view to look at from a profiling perspective?

Answer 1

• Top Down (Tree) When you want to view the root activities that cause the most work, use the.(Call tree)

• Bottom-Up (Heavy) When you want to view the activities where the most time was directly spent on each function.

• Top-Down (Heavy) I am just guessing for this one I think its the inverse of Bottom-Up (Heavy) so the function that took the most overall time including sub functions.