There has been a puzzle around me for a long time.
Why is everyone building JSON libraries?What is the performance gap between librariesWhat is the best JSON library for my project?
My project use the kotlin language, and I want to benchmark the performance of the JSON libraries.
JMH version: 1.35
VM version: JDK 18.0.1.1, OpenJDK 64-Bit Server VM, 18.0.1.1+2-6
Kotlin version: 1.7.20
jackson version: 2.14.0
moshi version: 1.14.0
gson version: 2.10
fastjson2 version: 2.0.21
Benchmark Mode Cnt Score Error Units
EishayTest.fastjson2 thrpt 3 160.925 ± 2718.448 ops/ms
EishayTest.gson thrpt 3 166.018 ± 2053.943 ops/ms
EishayTest.jackson thrpt 3 72.280 ± 1111.439 ops/ms
EishayTest.moshi thrpt 3 137.261 ± 1723.508 ops/ms
EishayTest.origin thrpt 3 42.250 ± 467.543 ops/ms
It's very close to the benchmark of some libraries.
But...
- The app receive the data from server and create object with the value only once.
- Why the libs is so faster than origin JSONObject operate?
I thought the result is not suitable the sense of the android platform. I run the benchmark with the diff mode:
enchmark Mode Cnt Score Error Units
EishayTest.fastjson2 thrpt 3 160.925 ± 2718.448 ops/ms
EishayTest.gson thrpt 3 166.018 ± 2053.943 ops/ms
EishayTest.jackson thrpt 3 72.280 ± 1111.439 ops/ms
EishayTest.moshi thrpt 3 137.261 ± 1723.508 ops/ms
EishayTest.origin thrpt 3 42.250 ± 467.543 ops/ms
EishayTest.fastjson2 avgt 3 0.017 ± 0.416 ms/op
EishayTest.gson avgt 3 0.011 ± 0.220 ms/op
EishayTest.jackson avgt 3 0.112 ± 3.234 ms/op
EishayTest.moshi avgt 3 0.016 ± 0.327 ms/op
EishayTest.origin avgt 3 0.031 ± 0.479 ms/op
EishayTest.fastjson2 sample 89589 0.014 ± 0.030 ms/op
EishayTest.fastjson2:fastjson2·p0.00 sample 0.003 ms/op
EishayTest.fastjson2:fastjson2·p0.50 sample 0.003 ms/op
EishayTest.fastjson2:fastjson2·p0.90 sample 0.008 ms/op
EishayTest.fastjson2:fastjson2·p0.95 sample 0.010 ms/op
EishayTest.fastjson2:fastjson2·p0.99 sample 0.020 ms/op
EishayTest.fastjson2:fastjson2·p0.999 sample 0.067 ms/op
EishayTest.fastjson2:fastjson2·p0.9999 sample 0.244 ms/op
EishayTest.fastjson2:fastjson2·p1.00 sample 825.229 ms/op
EishayTest.gson sample 69383 0.016 ± 0.029 ms/op
EishayTest.gson:gson·p0.00 sample 0.004 ms/op
EishayTest.gson:gson·p0.50 sample 0.004 ms/op
EishayTest.gson:gson·p0.90 sample 0.012 ms/op
EishayTest.gson:gson·p0.95 sample 0.016 ms/op
EishayTest.gson:gson·p0.99 sample 0.034 ms/op
EishayTest.gson:gson·p0.999 sample 0.132 ms/op
EishayTest.gson:gson·p0.9999 sample 2.192 ms/op
EishayTest.gson:gson·p1.00 sample 606.077 ms/op
EishayTest.jackson sample 60904 0.025 ± 0.041 ms/op
EishayTest.jackson:jackson·p0.00 sample 0.008 ms/op
EishayTest.jackson:jackson·p0.50 sample 0.008 ms/op
EishayTest.jackson:jackson·p0.90 sample 0.026 ms/op
EishayTest.jackson:jackson·p0.95 sample 0.034 ms/op
EishayTest.jackson:jackson·p0.99 sample 0.052 ms/op
EishayTest.jackson:jackson·p0.999 sample 0.171 ms/op
EishayTest.jackson:jackson·p0.9999 sample 0.925 ms/op
EishayTest.jackson:jackson·p1.00 sample 764.412 ms/op
EishayTest.moshi sample 57246 0.019 ± 0.035 ms/op
EishayTest.moshi:moshi·p0.00 sample 0.005 ms/op
EishayTest.moshi:moshi·p0.50 sample 0.005 ms/op
EishayTest.moshi:moshi·p0.90 sample 0.013 ms/op
EishayTest.moshi:moshi·p0.95 sample 0.025 ms/op
EishayTest.moshi:moshi·p0.99 sample 0.038 ms/op
EishayTest.moshi:moshi·p0.999 sample 0.115 ms/op
EishayTest.moshi:moshi·p0.9999 sample 1.975 ms/op
EishayTest.moshi:moshi·p1.00 sample 615.514 ms/op
EishayTest.origin sample 57079 0.031 ± 0.034 ms/op
EishayTest.origin:origin·p0.00 sample 0.016 ms/op
EishayTest.origin:origin·p0.50 sample 0.016 ms/op
EishayTest.origin:origin·p0.90 sample 0.030 ms/op
EishayTest.origin:origin·p0.95 sample 0.034 ms/op
EishayTest.origin:origin·p0.99 sample 0.047 ms/op
EishayTest.origin:origin·p0.999 sample 0.097 ms/op
EishayTest.origin:origin·p0.9999 sample 0.258 ms/op
EishayTest.origin:origin·p1.00 sample 585.105 ms/op
EishayTest.fastjson2 ss 3 268.355 ± 8474.181 ms/op
EishayTest.gson ss 3 197.297 ± 6226.390 ms/op
EishayTest.jackson ss 3 256.122 ± 8078.626 ms/op
EishayTest.moshi ss 3 212.561 ± 6703.983 ms/op
EishayTest.origin ss 3 193.982 ± 6122.227 ms/op
For one-short parsing, most libraries behave like your handwriting.
My choice is that ordinary apps written in Java use the Gson, and those written in Kotlin use Moshi.
You can fork the project and run the benchmark which you care.