Phoenix Live View enable Profiling

Phoenix LiveView has a way to enable Profiling in the client side by just adding this into the app.js file:

// app.js
liveSocket.enableProfiling();

That will enable a log into your browser console such as:

toString diff (update): 1.224853515625 ms
premorph container prep: 0.006103515625 ms
morphdom: 397.676025390625 ms
full patch complete: 411.117919921875 ms

In this case we can see that the morphdom library is taking a considerable time to apply my DOM patches as my page has a huge html table full of data.

BTW, this function adds to 2 other very useful ones for debugging the client:

• enableDebug ()
• enableLatencySim(ms)