据说提高magit的性能，想试试，可惜编译不过libegit2，而且在windows上cmake的时候似乎有依赖找不到，结果以下特性不能用 – Disabled features:
- debugpool, debug pool allocator
- tracing, tracing support
- SSH, SSH transport support
- SPNEGO, SPNEGO authentication support
- iconv, iconv encoding conversion support