Cache parsed object names (#675) #562

Job	Run time
Ruby memcheck	41s
ruby-versions / Generate Ruby versions	2s
ubuntu-22.04 2.7	1m 10s
ubuntu-22.04 3.0	28s
ubuntu-22.04 3.1	36s
ubuntu-22.04 3.2	49s
ubuntu-22.04 3.3	29s
ubuntu-22.04 head	1m 15s
ubuntu-22.04 jruby	1m 6s
ubuntu-22.04 jruby-head	1m 13s
macos-13 2.7	2m 25s
macos-13 3.0	52s
macos-13 3.1	40s
macos-13 3.2	42s
macos-13 3.3	49s
macos-13 head	29s
macos-13 jruby	1m 20s
macos-13 jruby-head	1m 19s
macos-14 2.7	59s
macos-14 3.0	33s
macos-14 3.1	26s
macos-14 3.2	21s
macos-14 3.3	22s
macos-14 head	18s
macos-14 jruby	41s
macos-14 jruby-head	1m 4s
windows-latest 2.7	4m 55s
windows-latest 3.0	1m 46s
windows-latest 3.1	2m 16s
windows-latest 3.2	2m 11s
windows-latest 3.3	4m 8s
windows-latest head	1m 38s
windows-latest mswin	1m 36s
ubuntu-latest jruby-9.4	1m 6s
macos-latest truffleruby-head	52s
ubuntu-latest truffleruby-head	2m 0s
	43m 37s

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