find src file for hdr performance

[hrehfeld]

Would it be possible to:

• put the source file detection into an async thread,
• cache the information?

The delay when opening a file is quite annoying.

[atilaneves]

I feel you.

Emacs doesn't do threads. Setting a callback while waiting for a process is doable, but here... I don't know. I'll take a look when I have time.

[hrehfeld]

Thanks ;-)