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rust-protobuf (rp)

  • Low runtime performance
  • Generates complicated proto rust types
    • Where some APIs provided are never used
  • Supports service
  • Supports zero-copy

quick-protobuf (qp)

  • Does not depend on protoc
  • Does not support services
  • Generates simple proto rust types
    • No trait objects
    • No virtual functions
  • Fastest among all (https://github.com/tafia/quick-protobuf/tree/master/perftest)
  • I Failed to generate anything in kvproto
    • Silly --include option, wrong relative path resolving
    • Even if we use absolute path, #133 still blocks the generation
  • The BytesReader's design is compatible with grpcio's zero copy
  • Summary of missing features: #12

prost (pr)

  • Faster than rp, according to qp's bench
  • Comments are retained
  • Cannot generate .proto imported by other .protos
    • Easy fix: create a .proto which imports all other protos and generate this proto
  • Generation process is a part of cargo build
  • Does not generate lib.rs, needs some manual editing
  • Not compatible with grpcio's zero copy (#134, #31)
  • Supports services via custom code generator