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radv: Reduce overhead of radv_emit_all_graphics_states

This is based on ideas from Mike's original patches.


CPU settings used for testing:

# Set all cores to use performance governor
for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do echo performance > $i; done
# Disable CPU boost
echo 0 > /sys/devices/system/cpu/cpufreq/boost
# Disable address space randomization
echo 0 > /proc/sys/kernel/randomize_va_space

Test score is the average of 5 runs:

for i in {1..5}; do echo "--- run $i"; ./vkoverhead -test 0 -duration 15; done
commit 6850U score 3900X score 7950X score i5-2500 score
main 882fd3c5 43084.8 31330.2 51047 20335.68
this MR 47486.8 39617.8 58162.2 23167
Edited by Timur Kristóf

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