Scala JSON Benchmark Report

The benchmark compares fory-json-scala, jsoniter-scala, and Jackson Scala on the same immutable Scala MediaContent model and Eishay JSON document. The String group excludes UTF-8 conversion; every library in the UTF-8 group uses its direct byte-array API.

Benchmark date: 2026-08-14
Source commit: 588ad6ab355c4c23fa0a2e4f269a8c733cba7b01
Platform: macOS-15.7.2-arm64-arm-64bit (arm64)
JDK: 26.0.1
VM: OpenJDK 64-Bit Server VM
JMH: 1.37
Warmup: 2 iterations × 1 s
Measurement: 2 iterations × 1 s
Forks: 1; threads: 1
Aggregation: median of 3 alternating short runs; error bars show the maximum cross-run deviation
Mode: throughput; higher is better

String

Scala JSON String benchmark throughput

UTF-8 Bytes

Scala JSON UTF-8 bytes benchmark throughput

Results

Representation	Operation	fory-json-scala ops/sec	jsoniter-scala ops/sec	Jackson Scala ops/sec	Fastest
String	Serialize	6,760,588	2,748,997	1,955,855	fory-json-scala
String	Deserialize	3,771,280	2,350,297	960,362	fory-json-scala
UTF-8 bytes	Serialize	9,485,122	2,745,567	1,761,719	fory-json-scala
UTF-8 bytes	Deserialize	3,318,893	2,391,923	1,080,453	fory-json-scala

Fory performance advantage

Representation	Operation	vs jsoniter-scala	vs Jackson Scala
String	Serialize	145.9%	245.7%
String	Deserialize	60.5%	292.7%
UTF-8 bytes	Serialize	245.5%	438.4%
UTF-8 bytes	Deserialize	38.8%	207.2%