workerless

[jerch]

WIP to get rid of the worker for sixels.

May close #7.

TODO:

• test cases for proper vertical cursor advance #37
• document worker removal

[jerch]

Now without worker:

• sixel processing ~1.5x faster
• latency got much better (making xtermdoom playable in firefox, too), also we now have quite instant cursor moves in jexer
• downside: decoding happens in mainthread (eats precious main CPU), still it is streamlined, thus should not create perceivable blocking
• 10 kB less on final packages
• no more separate worker file (much easier to deal with on integrator side)

The workerless rework actually surfaced another issue - #37. Should be fixed before we merge the PR and do another release.

[jerch]

#37 is still not fully fixed. It needs a more involved change in the decoder package (see #37 for details).

[pmp-p]

is it available for testing ?

[jerch]

@pmp-p
No not yet. Well you can build it from this PR, if you want (worker already gone).

#37 is currently blocking this PR, but I might do an independent release, if the fix gets too involving.

[jerch]

Postponing #37, as the adjustments needed to get that properly working are quite involved (needs a fundamental patch in the underlying lib).