An object’s OID is computed the same way git does it, SHA1(" \0"), using pgcrypto’s digest() function, and refs get compare-and-swap updates through SELECT FOR UPDATE. A libgit2 backend registers these tables as its storage layer, and if the protocol really is separable from the format, a normal git client should be able to push to and clone from a Postgres database without knowing the difference.
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Author(s): Marco Seiz, Tomohiro Takaki
int8 — 质量和大小之间的平衡。质量损失极小（约 1~3%），文件大小比 FP16 减少约 2 倍。