On Sun, Feb 09, 2025 at 03:16:19PM -0500, Vitalii wrote:
> When the display is turned off, the rendering of graphics is
> skipped, speeding up the pc. When the currently running command
> returns any exit code or when the display is turned on, the
> rendering of graphics occurs, setting the speed of the pc back
> to normal.
That should be irrelevant on any remotely current system. IIRC, on old
homecomputers (C64, ZX Spectrum, ...) the video output was done
by the CPU which also ran user code during vertical/horizontal
retrace.
Anything with dedicated video hardware (PCs starting way back with e.g.
CGA, pretty much all workstation systems) already offloaded generation
of the video signal to that and freed the CPU to do actual computation.
The closest you get to "CPU handles graphics" these days is systems with
dumb framebuffers - but even there, the CPU just dumps pixel updates into
the framebuffer and the actual output is done by dedicated hardware. And
most modern systems outside special cases tend of have pretty juicy graphics
accelerators (aka GPUs) where the CPU does very, very little.
Kind regards,
Alex.
--
"Opportunity is missed by most people because it is dressed in overalls and
looks like work." -- Thomas A. Edison
