# performance Trace tool

WeChat Andoid 6.5.10 Beginning, we provided Trace Export Tools, which developers can use in Developer Tools Trace Panel Uses this feature in.

# Use method

PC On need to be installed first adb Tools, you can refer to some mainstream tutorials for installation, Mac Up Available brew Direct installation.
determine adb Open on the developer tools after the tool has been successfully installed Trace Panel, will Android Phone through USB Connect on PC, clickChoose DevicesAt this time, the connection authorization box may pop up on the phone, please clickallow。
After selecting the device, open the development version Mini Program you need to debug on the phone. Through the upper right corner menu, open performance monitoring panel, restart the Mini Program
After reboot, operate on the Mini Program. After completing the operation, through the upper right corner menu, export Trace data
At this point developer tools Trace Panel On will automatically pull Trace File, select the one you want to analyze Trace Documents can be

Can be obtained by adb devices Command determines whether the device has been and PC Establish a connection

# Performance Panel

From WeChat 6.5.8 To begin with, we provide a performance panel that lets developers understand how Mini Programs perform. Developers can open the performance panel under the development version Mini Program. How to open it: Enter the development edition Mini Program, enter the top right corner more ons, clickDisplay Performance Window。

# Performance Panel Metrics Dxplaination

index	Explaination
CPU	Mini Program process CPU Occupancy, only Android Under offers
Memory	Memory footprint of the Mini Program process (Total Pss), only Android Under offers
Time to start	Total time spent on Mini Program startup
Downloading is time-consuming	Mini Programs are time-consuming to download and will be downloaded when they are first opened or when a resource pack needs updating
Page switching time-consuming	Time Consuming for Mini Program Page Switching
frame rate/FPS
First rendering time consuming	Time consuming for page first rendering
Rendering again time-consuming	Time consuming for the page to render again (usually by the developer's setData Operation trigger)
Data cache	Mini Program passes Storage Cache size stored by interface