Apply black_box to known bench inputs #185

Job	Run time
Test aarch64 (neon)	48s
Test with Miri	1m 4s
clippy_check	24s
msrv (aarch64)	2m 41s
msrv (x64)	2m 7s
Test stable on ubuntu-latest	21s
SIMD +sse4.2 on stable	23s
Test stable on windows-latest	1m 37s
SIMD +sse4.2 on stable	20s
Test stable on macOS-latest	52s
SIMD +avx2 on stable	30s
Test beta on ubuntu-latest	31s
SIMD +avx2 on stable	22s
Test beta on windows-latest	1m 17s
SIMD +sse4.2,+avx2 on stable	34s
Test beta on macOS-latest	54s
SIMD +sse4.2,+avx2 on stable	22s
Test nightly on ubuntu-latest	30s
SIMD +sse4.2 on beta	26s
Test nightly on windows-latest	1m 33s
SIMD +sse4.2 on beta	28s
Test nightly on macOS-latest	1m 1s
SIMD +avx2 on beta	30s
SIMD +avx2 on beta	29s
SIMD +sse4.2,+avx2 on beta	27s
SIMD +sse4.2,+avx2 on beta	26s
SIMD +sse4.2 on nightly	29s
SIMD +sse4.2 on nightly	26s
SIMD +avx2 on nightly	28s
SIMD +avx2 on nightly	31s
SIMD +sse4.2,+avx2 on nightly	33s
SIMD +sse4.2,+avx2 on nightly	27s
CI is green	1s
	23m 52s

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