Is protobuf a zero copy?

Protobuf has zero-copy support to avoid copying string/bytes fields when parsing protobuf messages and it’s used pretty much everywhere inside Google, but the feature has never made its way into the opensource repo.

Can a protobuf message be empty?

protobuf. Empty states: A generic empty message that you can re-use to avoid defining duplicated empty messages in your APIs. A typical example is to use it as the request or the response type of an API method.

Is protoc and protobuf the same?

“protobuf” or “protocol buffers” is the name of a serialization format and/or associated tooling. “. proto” is a schema DSL used for describing the messages you plan to use in your application – it is text based.

Is proto2 proto3 compatible?

Proto2 and proto3 are wire compatible. The same construct in proto2 and proto3 will have the same binary representation.

What is Capnp?

Cap’n Proto is an insanely fast data interchange format and capability-based RPC system. Think JSON, except binary. Or think Protocol Buffers, except faster. In fact, in benchmarks, Cap’n Proto is INFINITY TIMES faster than Protocol Buffers.

Can Protobuf fields be null?

Protobuf treats strings as primitive types and therefore they can not be null.

What is the difference between proto2 and Proto3?

Proto3 is the latest version of Protocol Buffers and includes the following changes from proto2: Field presence, also known as hasField , is removed by default for primitive fields. An unset primitive field has a language-defined default value.

Is protobuf an IDL?

Protobuf as an IDL and encoding layer DCE/RPC, like Protobuf, is designed to be language- and platform-neutral. The appropriate libraries and utilities allow any language and platform to play in the DCE/RPC arena.

Is proto2 deprecated?

Actually we have no plans to deprecate proto2 and we are still actively developing it, so you can really choose either one without having to worry about support going away.

What is faster than Protobuf?

Why is Protobuf faster?

Protobuf can serialize data so compactly mainly because it does not need to embed the field names as text in the data, possibly many times (“name” and “age” in this example are replaced by short descriptors of 2 bytes).

Protobuf doesn’t support the concept of “empty” enums — getting the value of an enum field will always return some value, even if the value was never set by the caller/recipient. If the person who creates an instance of Foo doesn’t set changeType, the client using that Foo instance will see a default value.

What is Google Protobuf empty?

Is protobuf compressed?

No it does not; there is no “compression” as such specified in the protobuf spec; however, it does (by default) use “varint encoding” – a variable-length encoding for integer data that means small values use less space; so 0-127 take 1 byte plus the header.

Is protobuf human readable?

If you’re using the protobuf package, the print function/statement will give you a human-readable representation of the message, because of the __str__ method :-). Indeed, this works.

Are proto2 and proto3 compatible?

Why is gRPC faster?

“gRPC is roughly 7 times faster than REST when receiving data & roughly 10 times faster than REST when sending data for this specific payload. This is mainly due to the tight packing of the Protocol Buffers and the use of HTTP/2 by gRPC.”

How do I use Google Protobuf?

To use the Any type, you must import the google/protobuf/any. proto definition. In the C# code, the Any class provides methods for setting the field, extracting the message, and checking the type. Protobuf’s internal reflection code uses the Descriptor static field on each generated type to resolve Any field types.