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Severe slowdown when enabling Direct on Serial port.
I enabled this after suggestion from another thread. The result was that previously snappy Workbench felt like wading trough mud. When opening drawers it uses several seconds to paint backdorp, which was instant before enabling direct.
So I tested with timed boot to WB desktop compleatly loaded with background-pic.
Without serial-direct it boots in 24 seconds.
With serial-direct it boots in 109 seconds.
I repeated this test several times, switching direct on and off. Tried both restarting and quitting WinUAE between tests. Result is consequently the same every time.
I must note that no access to serial port was made from amiga side during tests, I just flipped the direct switch in config. MuForce and friends where running, but not outputting anything.
Attached are UAE logs from boot with direct enabled and WinUAE-config.
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