very simple strong-cache on model list (#4969) #173

Job	Run time
test-unix-nightly (macos, 3.11, 12.1, nightly)	9m 2s
test-stable (macos, 3.9, 12.1, stable)	8m 52s
test-unix-nightly (linux, 3.11, 12.1, nightly)	5m 56s
test-stable (macos, 3.10, 12.1, stable)	8m 55s
test-win-nightly (windows, 3.9, 12.1, nightly)	3m 38s
test-stable (macos, 3.11, 12.1, stable)	8m 52s
test-win-nightly (windows, 3.10, 12.1, nightly)	3m 46s
test-stable (macos, 3.12, 12.1, stable)	8m 55s
test-win-nightly (windows, 3.11, 12.1, nightly)	3m 49s
test-stable (linux, 3.9, 12.1, stable)	6m 3s
test-win-nightly (windows, 3.12, 12.1, nightly)	3m 51s
test-stable (linux, 3.10, 12.1, stable)	6m 3s
test-stable (linux, 3.11, 12.1, stable)	6m 3s
test-stable (linux, 3.12, 12.1, stable)	6m 1s
test-stable (windows, 3.9, 12.1, stable)	3m 36s
test-stable (windows, 3.10, 12.1, stable)	3m 33s
test-stable (windows, 3.11, 12.1, stable)	3m 38s
test-stable (windows, 3.12, 12.1, stable)	3m 39s
	1h 44m 12s

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