perf: optimize plot drawing #378

Job	Run time
build-packages (debian-12, lact)	4m 29s
build-packages (debian-12, lact-headless)	3m 2s
build-packages (ubuntu-2204, lact)	4m 30s
build-packages (ubuntu-2204, lact-headless)	2m 51s
build-packages (fedora-39, lact)	5m 0s
build-packages (fedora-39, lact-headless)	3m 32s
build-packages (fedora-40, lact)	4m 31s
build-packages (fedora-40, lact-headless)	2m 58s
build-packages (arch, lact)	4m 14s
build-packages (arch, lact-headless)	2m 57s
build-packages (opensuse-tumbleweed, lact)	4m 26s
build-packages (opensuse-tumbleweed, lact-headless)	2m 58s
build-packages (fedora-39, lact-libadwaita)	5m 27s
build-packages (fedora-40, lact-libadwaita)	4m 45s
build-packages (arch, lact-libadwaita)	4m 22s
build-packages (opensuse-tumbleweed, lact-libadwaita)	4m 50s
create-release	38s
	1h 5m 30s

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