UI is slow on Windows

Hello,

Please correct me if this isn't the right place to talk about this.

First I would like to say - the project is awesome, I was very glad to find it :)

On my Windows machine, running CPython 3.7 and using gdbgui to debug C programs, I'm having performance problems in the web GUI.

When stepping through the code (using `n` and `s` shortcuts), the commands may take 2-3 seconds (or more) to execute. This renders the program almost unusable.

I would like to ask if there is a known solution to this.

Thank you!