Tracer tool for JavaScript

Hi!

I was actually looking for something else when I stumbled upon this:
https://trace.gl/

It’s a tracer tool for JS that’s more powerfull than Chrome’s and Firebug combined, the developers call it “an oscilloscope for code”. It’s priced at 15$, which for commercial projects is a laughable amount.

Have you guys tried this or other similar tools? Which do you reccomend?

It looks like a powerful tool. I have not tried these style of tools.

It will add some code into the project, and use WebSocket to receive the code stream.
I am not sure it will change the code behavior or not.

It will be helpful for code logic debugging, but I don’t think it is good for profiling.

We are more familiar on Chrome developer tools.