Xpra: Ticket #2347: faster client startup

Same as #2341 but for the client.

We already have:

Sun, 30 Jun 2019 13:06:38 GMT - Antoine Martin: status changed

Added some debug logging in r23053 + r23054 + r23055.

Places where we spend most of the startup time:

Start to finish only takes 2 seconds, more than half of which is the opengl probing! With --no-speaker --no-microphone --opengl=no --encodings=rgb --video-decoders=none --csc-modules=none --tray=no, my python3 client starts in just 0.5s.

Mon, 01 Jul 2019 19:32:28 GMT - Antoine Martin: status changed; resolution set


That's enough I think.

Tue, 02 Jul 2019 07:40:57 GMT - Antoine Martin:

See also: #2349 cache audio query

Tue, 02 Jul 2019 07:45:44 GMT - mviereck: cc set

Sat, 23 Jan 2021 05:48:52 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2347