Cap'n Proto Encoder

Cap'n Proto is by far the fastest supported output format.

It can be selected in the [output] section of the configuration file:

[output]
format = "capnp"
framing = "capnp"

Records are serialized using the record.capnp file.

Additional key/value pairs can be unconditionally added to all messages with a [output.capnp_extra] section:

[output]
format = "capnp"
framing = "capnp"

[output.capnp_extra]
x-header1 = "x-header1 value"
x-header2 = "x-header2 value"

Cap'n Proto is ideal to forward data from a flowgger instance to another instance. It is guaranteed to be more compact and faster than other formats.