oj
JSON serializer · measured on 46 of 99 environments ·#1 in 2 of 9 measurements · primary environment: macOS 26 · arm64 · Ruby 3.2
Measured environments
macOS 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 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 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 | 2/12 | 1.1× slower than rapidjson |
| Parse | medium | 260 | 3.8 | 2/12 | 2.9× slower than json |
| Parse | large | 25.3 | 39.5 | 4/12 | 1.6× slower than json |
| Generate | small | 400k | 0.0 | 1/10 | best in field |
| Generate | medium | 296 | 3.4 | 3/10 | 1.5× slower than json |
| Generate | large | 19.0 | 52.7 | 2/10 | 1.9× slower than json |
| Stream | small | 68k | 0.0 | 2/2 | 4.3× slower than yajl |
| Stream | medium | 224 | 4.5 | 1/2 | best in field |
| Stream | large | 16.8 | 59.6 | 2/2 | 1.3× slower than yajl |
Compare every library on every environment on the dashboard.
oj measured on macOS 26 · arm64 · Ruby 3.2, JSONworkloads — serialbench, 2026-10-19. Full data: data/macos-26-ruby-3.2.yaml.