ormsgpack benchmark comparison

[LockedThread]

Question

Are there benchmarks against ormsgpack? I currently use ormsgpack for work in combination with pydantic but the speed degredation of pydantic for validating our extremely large objects is becoming a bottleneck. I am looking for alternatives?

[jcrist]

Thanks for opening this, I hadn't heard of ormsgpack before. I've added it to our benchmarks, see the msgpack benchmarks here.

A brief summary:

• Without type information, msgspec is roughly 1.3x faster at encoding and 1.5x faster at decoding than ormsgpack
• When a schema is provided (so validation & decoding into dataclass-like objects is done), msgspec is roughly 1.4x faster at encoding and 2.1x faster at decoding than ormsgpack

This may seem counterintuitive - how can msgspec be faster at decoding AND validating than decoding alone? This is due to two reasons:

• msgspec.Struct types are much more efficient datastructures than dicts, so decoding into a struct type is a cheaper operation
• Schema information lets us take some shortcuts when decoding to improve efficiency

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Anyway, the gist is that

• msgspec is definitely faster than ormsgpack in all cases
• msgspec will certainly be faster than ormsgpack + pydantic for decoding and validating msgpack messages.

I originally wrote msgspec specifically as an efficient pydantic-like thing with a high-performance msgpack decoder, so your use case sounds like the ideal case for this library. If you decide to try it out, please let me know if you run into any rough edges.