Speed up Comparison #1501

Job	Run time
collect-experiments	6s
unittest	1m 47s
run-test (tests/ci/rand_soc.yaml)	31m 34s
run-test (tests/ci/randsoc_dumped.yaml)	34m 23s
run-test (tests/ci/vivado_bit_analysis.yaml)	12m 58s
run-test (tests/ci/vivado_bit_to_netlist.yaml)	10m 41s
run-test (tests/ci/vivado_conformal.yaml)	4m 6s
run-test (tests/ci/vivado_ooc.yaml)	16m 56s
run-test (tests/ci/vivado_phys_netlist.yaml)	14m 54s
run-test (tests/ci/vivado_phys_netlist_cmp.yaml)	18m 1s
run-test (tests/ci/vivado_phys_netlist_error_inject.yaml)	15m 12s
run-test (tests/ci/vivado_wafove.yaml)	14m 13s
run-test (tests/ci/vivado_yosys_impl.yaml)	12m 1s
	3h 6m 52s

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