D24976: Write FITS file on separate thread

[Hy Murveit]

murveit added a comment.


  I tested this with my ASI1600, where the .fits files are 32.8Mb. Works fine. 
  In fact, it's likely that the larger the file, the more the speedup--as I guess the disk-write would take longer.
  The only place where there would be extra memory used is where I do the memcpy in indiccd.cpp:1470.
  I wasn't sure I needed to do that, but I didn't think I could rely on the blob memory staying put, so I conservatively
  ran the memcpy, and created that buffer that I keep around. That memcpy takes less than 100ms on my RPi4 with Release build.

REPOSITORY
  R321 KStars

REVISION DETAIL
  https://phabricator.kde.org/D24976

To: murveit, mutlaqja
Cc: kde-edu, narvaez, apol
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