Cache mapper instantiations #33412

Job	Run time
coverage	14m 33s
lint	56s
Test Node 22 on ubuntu-latest	12m 54s
baselines	12m 51s
browser-integration	2m 1s
Test Node 20 on ubuntu-latest	12m 51s
format	24s
Test Node 18 on ubuntu-latest	13m 53s
knip	34s
Test Node 16 on ubuntu-latest	14m 10s
misc	34s
package-size	1m 38s
Test Node 14 on ubuntu-latest	14m 19s
self-check	1m 3s
Test Node 22 on windows-latest	13m 57s
smoke	53s
Test Node 20 on windows-latest	14m 58s
typecheck	42s
Test Node 18 on windows-latest	15m 59s
Test Node 16 on windows-latest	16m 14s
Test Node 14 on windows-latest	17m 1s
Test Node 22 on macos-latest	9m 56s
Test Node 20 on macos-latest	9m 21s
Test Node 18 on macos-latest	9m 35s
Test Node 16 on macos-latest	12m 30s
Test Node lts/* on ubuntu-latest with --no-bundle	16m 7s
	3h 59m 54s

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