Benchmark Results

Generated: 2025-12-20 18:39:52 UTC

Library Notes

Feature Comparison

Feature	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Declarative constraints	✅ tags	✅ tags	✅ rules	✅ tags	✅ methods	❌ hand-written
JSON Schema generation	✅	❌	❌	✅	✅	❌
Default values	✅	❌	❌	❌	✅	✅
Unmarshal + validate	✅	❌	❌	✅	✅	✅
Validate existing struct	✅	✅	✅	❌	✅	❌*

*Godasse requires hand-written Validate() methods

Library Descriptions

1. Pedantigo - Struct tag-based validation (validate:"required,email,min=5"). JSON Schema generation with caching.

2. Playground (go-playground/validator) - Struct tag-based validation. Rich constraint library, no JSON Schema.

3. Ozzo (ozzo-validation) - Rule builder API (validation.Field(&u.Name, validation.Required, validation.Length(2,100))). No struct tags.

4. Huma - OpenAPI-focused. Validates map[string]any against schemas, not structs directly.

5. Godantic - Method-based constraints (FieldName() FieldOptions[T]). JSON Schema, defaults, streaming partial JSON.

6. Godasse - Deserializer with default: tag. All constraint validation requires hand-written Validate() methods.

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Marshal

Validate + JSON marshal

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Simple	1.88 µs (11 allocs)	2.69 µs (9 allocs)	unsupported	unsupported	unsupported	unsupported

New

Validator creation overhead

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Simple	11.87 µs (110 allocs)	16.05 µs (187 allocs)	unsupported	30.05 µs (255 allocs)	26.55 µs (305 allocs)	6.67 µs (72 allocs)
Complex	28.70 µs (270 allocs)	unsupported	unsupported	73.61 µs (515 allocs)	7.49 µs (75 allocs)	23.32 µs (243 allocs)

OpenAPI

OpenAPI-compatible schema generation

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Uncached	23.46 µs (204 allocs)	unsupported	unsupported	30.30 µs (255 allocs)	unsupported	unsupported
Cached	18 ns (0 allocs)	unsupported	unsupported	645 ns (6 allocs)	unsupported	unsupported

Schema

JSON Schema generation

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Uncached	22.74 µs (202 allocs)	unsupported	unsupported	30.18 µs (255 allocs)	unsupported	unsupported
Cached	18 ns (0 allocs)	unsupported	unsupported	638 ns (6 allocs)	unsupported	unsupported

UnmarshalDirect

json.Unmarshal + Validate (no intermediate map)

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Simple	3.45 µs (19 allocs)	4.26 µs (16 allocs)	unsupported	unsupported	unsupported	unsupported
Complex	9.89 µs (39 allocs)	11.07 µs (33 allocs)	unsupported	unsupported	unsupported	unsupported

UnmarshalMap

JSON → map → validate (Pedantigo validates and outputs struct, Huma only validates the map)

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Simple	4.99 µs (39 allocs)	unsupported	unsupported	3.55 µs (26 allocs)	unsupported	5.43 µs (46 allocs)
Complex	18.23 µs (135 allocs)	unsupported	unsupported	10.36 µs (78 allocs)	unsupported	17.28 µs (153 allocs)

Validate

Validate existing struct (no JSON parsing)

Struct	Pedantigo	Playground	Ozzo	Huma	Godantic	Godasse
Simple	1.43 µs (10 allocs)	2.16 µs (7 allocs)	12.81 µs (43 allocs)	unsupported	6.03 µs (48 allocs)	unsupported
Complex	2.26 µs (15 allocs)	3.43 µs (9 allocs)	12.31 µs (139 allocs)	unsupported	13.87 µs (120 allocs)	unsupported
Large	1.60 µs (22 allocs)	1.85 µs (3 allocs)	46.97 µs (254 allocs)	unsupported	14.79 µs (126 allocs)	unsupported

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Summary

Validate_Simple (struct validation)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	1.43 µs	10	baseline
Playground	2.16 µs	7	1.51x slower
Ozzo	12.81 µs	43	8.94x slower
Huma	-	-	-
Godantic	6.03 µs	48	4.21x slower
Godasse	-	-	-

Validate_Complex (nested structs)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	2.26 µs	15	baseline
Playground	3.43 µs	9	1.52x slower
Ozzo	12.31 µs	139	5.45x slower
Huma	-	-	-
Godantic	13.87 µs	120	6.15x slower
Godasse	-	-	-

UnmarshalMap_Simple (JSON → struct + validate)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	4.99 µs	39	baseline
Playground	-	-	-
Ozzo	-	-	-
Huma	3.55 µs	26	1.40x faster
Godantic	-	-	-
Godasse	5.43 µs	46	1.09x slower

UnmarshalMap_Complex (nested JSON)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	18.23 µs	135	baseline
Playground	-	-	-
Ozzo	-	-	-
Huma	10.36 µs	78	1.76x faster
Godantic	-	-	-
Godasse	17.28 µs	153	1.05x faster

Schema_Uncached (first-time generation)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	22.74 µs	202	baseline
Playground	-	-	-
Ozzo	-	-	-
Huma	30.18 µs	255	1.33x slower
Godantic	-	-	-
Godasse	-	-	-

Schema_Cached (cached lookup)

Library	ns/op	allocs	vs Pedantigo
Pedantigo	18 ns	0	baseline
Playground	-	-	-
Ozzo	-	-	-
Huma	638 ns	6	34.87x slower
Godantic	-	-	-
Godasse	-	-	-

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Generated by pedantigo-benchmarks

Benchmark naming convention

Benchmark_<Library>_<Feature>_<Struct>

Libraries: Pedantigo, Playground, Ozzo, Huma, Godantic, Godasse
Features: Validate, UnmarshalMap, UnmarshalDirect, New, Schema, OpenAPI, Marshal
Structs: Simple (5 fields), Complex (nested), Large (20+ fields)