msgspec-patterns

Optimize msgspec Struct serialization by applying performance options like omit_defaults, array_like, and tagged unions to reduce payload size and improve encoding and decoding speed.

Using gc=False in msgspec Structs is safe only when the struct avoids reference cycles, mutable containers, and back-references, preventing memory leaks and unsafe garbage collection behavior.

Prefer msgspec Struct over dataclasses or dicts for schema-driven Python objects because it provides faster serialization, improved correctness, and better memory efficiency for configuration schemas and API payloads.

Audit existing msgspec structs for memory risks by evaluating struct options, checking for reference cycles, and analyzing decoding behavior to identify potential performance regressions and unsafe garbage collection patterns.

Reduce msgspec payload size for API responses by applying the omit_defaults option to exclude default values and using tagged unions to efficiently encode variant data structures during serialization.

Using gc=False with mutable containers in msgspec introduces reference cycle risks that the garbage collector cannot manage, potentially causing memory leaks and unsafe memory behavior during deserialization.