The InstanceData type in the rendering subsystem was previously 16
floats which occupied a total of 64 bytes per instance. This meant that
for every character or background cell drawn, 64 bytes were sent to the
GPU. In the case of a 400x100 cell grid, a total of 2.5MB would be sent.
This patch reduces InstanceData's size to 26 bytes, a 60% improvement!
Using the above example for comparison, a worst case of 1MB would be
transferred.
The motivation for this patch comes from macOS. Once the terminal grid
would reach a certain size, performance experienced a sharp and dramatic
drop (render times would go from ~3ms to ~16ms). I don't want to
speculate too much on the underlying issue, but suffice it to say that
this patch alleviates the problem in my testing.
5a220b7...
by
Dimas Cyriaco <email address hidden>
Add support for the VTE 'dim' flag, with additional support for
custom-themed dim colors. If no color is specified in the config, it
will default to 2/3 the previous (not a spec, but the value other
terminals seem to use).
The actual dimming behavior brings bright colors to normal and regular
colors to the new dim ones. Custom RGB values are not changed, nor are
non-named indexed colors.
