Speed up NewShaX #1205

Job	Run time
mactest (1.22.x, /usr/local/opt/openssl@3/lib/libcrypto.3.dylib)	1m 41s
cgolessbuild	9s
azurelinux	37s
mactest (1.23.x, /usr/local/opt/openssl@3/lib/libcrypto.3.dylib)	1m 14s
mariner2	42s
test (1.22.x, 1.0.2)	3m 23s
wintest (1.22.x, libcrypto-1_1-x64.dll)	2m 27s
wintest (1.22.x, libcrypto-3-x64.dll)	2m 52s
wintest (1.23.x, libcrypto-1_1-x64.dll)	2m 18s
test (1.22.x, 1.1.0)	2m 52s
test (1.22.x, 1.1.1)	2m 52s
wintest (1.23.x, libcrypto-3-x64.dll)	2m 11s
test (1.22.x, 3.0.1)	6m 2s
test (1.22.x, 3.0.13)	6m 16s
test (1.22.x, 3.1.5)	4m 47s
test (1.22.x, 3.2.1)	5m 13s
test (1.22.x, 3.3.0)	5m 20s
test (1.22.x, 3.3.1)	5m 32s
test (1.23.x, 1.0.2)	3m 26s
test (1.23.x, 1.1.0)	2m 47s
test (1.23.x, 1.1.1)	2m 58s
test (1.23.x, 3.0.1)	5m 45s
test (1.23.x, 3.0.13)	6m 17s
test (1.23.x, 3.1.5)	4m 43s
test (1.23.x, 3.2.1)	5m 33s
test (1.23.x, 3.3.0)	5m 16s
test (1.23.x, 3.3.1)	5m 43s
	1h 38m 56s

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