Merge pull request #443 from ruby/rmf-graph #1498

Job	Run time
test (truffleruby)	1m 16s
benchmark-default (ruby)	11m 21s
test (ruby)	59s
benchmark-ractor (ruby)	12m 52s
test (head)	48s
benchmark-ractor (head)	12m 41s
benchmark-ractor-only (ruby)	55s
benchmark-ractor (truffleruby)	17s
benchmark-ractor-only (truffleruby)	13s
benchmark-default (truffleruby)	26s
benchmark-run-once	1m 35s
benchmark-graph	49s
benchmark-ractor-only (head)	46s
benchmark-default (head)	11m 28s
all-tests	2s
	56m 28s

Provide feedback