When running sandbox with lots of console output, the vidconsole slows
things down significantly since it renders truetype fonts to the
internal framebuffer. Add a -Q/--quiet_vidconsole command-line option
that removes vidconsole from stdout and stderr, using only the serial
console.
This can provide a ~300x speedup for output-heavy operations.
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
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