github.com/muscula/json-schema-benchmark

json-schema-benchmark (draft6)

Performance benchmark for Node.js JSON-schema validators.

Also tests against official JSON-schema test suite, version draft6. and checks for validators that cause side-effects on schema or data. The top 6 validators that fail the least tests are included in the benchmark.

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Performance

Validator	Relative speed	Number of test runs per second
ajv	100%	17000 (± 0.34%)
@exodus/schemasafe	69.2%	11760 (± 0.89%)
is-my-json-valid	51.5%	8757 (± 0.37%)
djv	13.1%	2223 (± 1.24%)
@cfworker/json-schema	5.1%	865 (± 1.15%)
jsonschema	1.2%	198 (± 1.11%)

884 tests are run in each test run.

Validators tested: @exodus/schemasafe (1.0.0-rc.3), @cfworker/json-schema (1.6.3), ajv (6.12.6), jsonschema (1.4.0), djv (2.1.3-alpha.0), is-my-json-valid (2.20.5), json-schema-library (4.1.4), jsen (0.6.6), tv4 (1.3.0), z-schema (5.0.0), jjv (1.0.2), jassi (0.1.2), themis (1.1.6), request-validator (0.3.3), json-schema-validator-generator (1.1.11), json-model (0.2.24), jsck (0.3.2), JSV (4.0.2), skeemas (1.2.5), schemasaurus (0.7.8), json-gate (0.8.23), revalidator (0.3.1),

(validators not in the results above where excluded because of failing tests - see below for details)

ajv is currently the fastest JSON-schema validator out there.

Test failure summary

This test suite uses the official JSON-schema test suite, version draft6.

If a validator does not pass a test in the official test suite, it will show up in these results.

Validator	Number of failing tests (click for details)
@exodus/schemasafe	8
@cfworker/json-schema	9
ajv	10
jsonschema	33
djv	99
is-my-json-valid	111
json-schema-library	140
jsen	141
tv4	155
z-schema	169
jjv	171
jassi	172
themis	189
request-validator	207
json-schema-validator-generator	216
json-model	225
jsck	227
JSV	234
skeemas	235
schemasaurus	237
json-gate	342
revalidator	384

Some validators have deliberately chosen not to support parts of the spec. Go to the homepage of the validator to learn if that is the case for these tests.

Side-effects summary

Number of tests that caused side-effects. The schema or data was altered by the validator.

Validator	Number of side-effects (BAD)
revalidator	818
json-model	833

Validators not in the list have no side-effects on data or schemas.

Tests for other JSON-schema versions

• draft7
• draft6
• draft4

Features of validators

Note that these benchmarks and tests do not take into account other more advanced features of the validators. I encourage you to take a look at each validator if you are looking for special features.

Benchmarks by validator authors and others

Several of the validators have build benchmarks themselves. They are more detailed then the benchmarks provided above.

Benchmarks owned by z-schema

Benchmarks owned by themis

Benchmarks owned by jsck

There is also a benchmark suite by cosmicrealms.

License

MIT