simple_canvas_game | Quick tutorial on how to make a simple HTML5 Canvas game | Game Engine library

Dev tools can add a lot of additional load on the device. Much more so when you are recording a performance log.

React is the last thing I would use for a real-time app as it adds allot of behind the scene JS to even simplest tasks.

Calculating performance by measuring the time between frames does not give you an accurate indication of performance.

To measure the performance of a function use the performance API. The simplest way is via performance.now using it to get the time a function takes to complete.

For example to get the time of the main loop function in a game