copygen
A Go code generator that creates type-to-type and field-to-field copy functions without reflection, offering high performance and customization.
What is copygen?
Copygen is a Go code generator that creates custom functions to copy values between Go types and map fields between structs. It solves the problem of writing repetitive, error-prone manual copy code by generating efficient, reflection-free implementations that are up to 391x faster than reflection-based alternatives like jinzhu/copier.
Go developers working with multiple model layers (e.g., domain models, database models, API models) who need performant, maintainable data transformation between types without runtime overhead.
Developers choose Copygen for its combination of high performance (no reflection, no allocations), full Go type support, and extensive customization via templates and matching options, allowing it to generate not just copy functions but any type-based code.
Overview
Copygen generates code based on Go types. Generate type-based code to copy values from type to type and fields from struct to struct by default (copier without reflection).
Use Cases
Best For
- Generating data mapping functions between domain and database models in Go applications
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