Performance improvements for fixed resolution buffer #750

Job	Run time
initial_checks / Load tox environments	6s
initial_checks / codestyle (ubuntu-latest)	22s
tests / Load tox environments	7s
tests / py38-test-lts-all (ubuntu-latest)	1m 49s
tests / py39-test (ubuntu-latest)	1m 37s
tests / py310-test-all (ubuntu-latest)	1m 42s
tests / py311-test (ubuntu-latest)	1m 34s
tests / py312-test-all (ubuntu-latest)	2m 21s
tests / py38-docs (ubuntu-latest)	4m 0s
tests / py311-docs (macos-latest)	1m 53s
tests / py38-test-all (macos-12)	2m 35s
tests / py39-test (macos-12)	3m 10s
tests / py310-test-all (macos-latest)	1m 28s
tests / py311-test (macos-latest)	1m 31s
tests / py312-test-all (macos-latest)	1m 52s
tests / py38-test (windows-latest)	3m 10s
tests / py39-test (windows-latest)	3m 5s
tests / py310-test-dev-all (ubuntu-latest)	3m 19s
tests / py311-test-dev (ubuntu-latest)	2m 5s
tests / py312-test-dev-all (ubuntu-latest)	2m 36s
tests / py311-test-dev-all (macos-latest)	2m 5s
tests / py312-test-dev (macos-latest)	1m 59s
tests / py310-test-dev (windows-latest)	3m 35s
publish / Build source and wheel distribution	2m 48s
	50m 49s

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