protobuf.js/bench/cases/common/bench.proto

syntax = "proto3";

message Test {

    string  string = 1;
    uint32  uint32 = 2;
    Inner   inner  = 3;
    float   float  = 4; // make sure to set something that's fair to JSON

    message Inner {

        int32      int32      = 1;
        InnerInner innerInner = 2;
        Outer      outer      = 3;

        message InnerInner {

            int64  long   = 1;
            Enum   enum   = 2;
            sint32 sint32 = 3;
        }
    }

    enum Enum {

        ONE   = 0;
        TWO   = 1;
        THREE = 2;
        FOUR  = 3;
        FIVE  = 4;
    }
}

message Outer {

    repeated bool bool = 1;
    double double = 2; // make sure to set something that's fair to JSON
}