json

JSON serializer · measured on 86 of 106 environments ·#1 in 4 of 6 measurements · primary environment: macOS 26 · arm64 · Ruby 3.2

Measured environments

macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26macOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 26 IntelmacOS 15macOS 15macOS 15macOS 15macOS 15macOS 15macOS 15macOS 15macOS 15macOS 15macOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 15 IntelmacOS 14macOS 14macOS 14macOS 14macOS 14macOS 14macOS 14macOS 14Windows 2025Windows 2025Windows 2025Windows 2025Windows 2025Windows 2025Windows 2025Windows 2025Windows 2025Windows 11Windows 11Windows 2022Windows 2022Windows 2022Windows 2022Windows 2022Windows 2022Windows 2022Windows 2022Windows 2022Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 24.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04Ubuntu 22.04

Iterations per second on the primary environment · rank vs the field

Operation	Input	ips	ms/op	Rank	vs best
Parse	small	588k	0.0	1/12	best in field
Parse	medium	471	2.1	1/12	best in field
Parse	large	27.0	37.0	4/12	1.7× slower than rapidjson
Generate	small	385k	0.0	2/11	1.0× slower than oj
Generate	medium	953	1.0	1/11	best in field
Generate	large	57.0	17.6	1/11	best in field

Compare every library on every environment on the dashboard.

Cite

json measured on macOS 26 · arm64 · Ruby 3.2, JSONworkloads — serialbench, 2026-10-23. Full data: data/macos-26-ruby-3.2.yaml.