Slow Switching Between Tabs "When show uncovered code in editor" Is Activated

[hdmjack]

With the option activated, switching between open tabs feels noticeably laggy, even with small files. Disabling it immediately fixes the issue.

PS: thank you so much for the great package!

[hdmjack]

I will dig into the profiling to try to pin-point the issue.

[lloiser]

One of the reason is that linting and getting the coverage are two "requests" to flow that basically happen at the very same time.
Did you find anything? Having a CPU profile that actually "shows" this lag would be nice :)