Create encodings.md #349

Job	Run time
g++-11, Release, Static	3m 34s
g++-11, Release, Shared	3m 30s
clang++-14, Release, Static	3m 0s
clang++-14, Release, Shared	3m 13s
clang++-15, Release, Static	4m 24s
clang++-15, Release, Shared	3m 1s
g++-11, RelWithDebInfo, Static	3m 54s
g++-11, RelWithDebInfo, Shared	3m 32s
clang++-14, RelWithDebInfo, Static	4m 19s
clang++-14, RelWithDebInfo, Shared	2m 56s
clang++-15, RelWithDebInfo, Static	4m 31s
clang++-15, RelWithDebInfo, Shared	3m 22s
	43m 16s

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