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‎CHANGELOG.md‎

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# Changelog
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## 1.2.0 - 2018-12-16
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### Changed
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- Performance improvements.
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## 1.1.0 - 2018-12-04
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### Changed
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- Performance improvements.
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### Fixed
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- Dict key can only be str.
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## 1.0.1 - 2018-11-26
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### Fixed

‎Cargo.lock‎

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‎Cargo.toml‎

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[package]
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name = "orjson"
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version = "1.1.0"
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version = "1.2.0"
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authors = []
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description = "Fast Python JSON library"
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edition = '2018'

‎README.md‎

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# orjson
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orjson is a fast JSON library for Python. It benchmarks as the fastest Python
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library for JSON serialization, about twice as fast or more as the nearest
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other library, with deserialization performance slightly worse to similar to
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the fastest library.
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library for JSON serialization, with 1.6x to 2.6x the performance as the nearest
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other library, with deserialization performance of 0.95x to 1.2x
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the nearest other library.
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It supports CPython 3.5, 3.6, and 3.7. It is not intended
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as a drop-in replacement for the standard library's json module.
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and Python environment:
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```sh
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git checkout https://github.com/ijl/orjson.git && cd orjson
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git submodule init && git submodule update
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git clone --recurse-submodules https://github.com/ijl/orjson.git && cd orjson
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virtualenv .venv && source .venv/bin/activate
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pip install --upgrade pyo3-pack
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pyo3-pack build --release --strip --interpreter python3.7
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```
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## Performance
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Serialization performance of orjson is better than ultrajson, rapidjson, or
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json. Deserialization performance is worse to about the same as ultrajson.
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json. Deserialization performance is better to about the same as ultrajson.
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![alt text](doc/twitter-serialize.png "twitter.json serialization")
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![alt text](doc/citm_catalog-serialize.png "citm_catalog.json serialization")
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![alt text](doc/canada-serialize.png "canada.json serialization")
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![alt text](doc/twitter_serialization.png "twitter.json serialization")
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![alt text](doc/twitter_deserialization.png "twitter.json deserialization")
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![alt text](doc/citm_catalog_serialization.png "citm_catalog.json serialization")
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![alt text](doc/citm_catalog_deserialization.png "citm_catalog.json deserialization")
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![alt text](doc/github_serialization.png "github.json serialization")
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![alt text](doc/github_deserialization.png "github.json deserialization")
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![alt text](doc/canada_serialization.png "canada.json serialization")
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![alt text](doc/canada_deserialization.png "canada.json deserialization")
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#### canada.json deserialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 8.72 | 114.8 | 1.25 |
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| ujson | 6.95 | 138.4 | 1 |
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| rapidjson | 27.75 | 36 | 3.99 |
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| json | 27.22 | 36.6 | 3.92 |
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| orjson | 7.59 | 131.8 | 1 |
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| ujson | 7.26 | 133.5 | 0.96 |
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| rapidjson | 26.72 | 37.4 | 3.52 |
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| json | 26.78 | 37.3 | 3.53 |
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#### canada.json serialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 5.12 | 195.4 | 1 |
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| ujson | 8.19 | 122.1 | 1.6 |
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| rapidjson | 44.48 | 22.5 | 8.69 |
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| json | 46.85 | 21.3 | 9.16 |
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| orjson | 4.99 | 200.3 | 1 |
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| ujson | 8.16 | 122.5 | 1.64 |
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| rapidjson | 43.27 | 23.1 | 8.67 |
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| json | 48.15 | 20.8 | 9.65 |
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#### citm_catalog.json deserialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 6.06 | 164.9 | 1.12 |
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| ujson | 5.4 | 185.2 | 1 |
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| rapidjson | 7.26 | 137.6 | 1.35 |
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| json | 7.49 | 132.2 | 1.39 |
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| orjson | 5.05 | 198.2 | 1 |
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| ujson | 6.2 | 161.2 | 1.23 |
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| rapidjson | 6.57 | 152.2 | 1.3 |
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| json | 6.62 | 151.1 | 1.31 |
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#### citm_catalog.json serialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 1.02 | 980.6 | 1 |
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| ujson | 2.53 | 394.4 | 2.49 |
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| rapidjson | 2.37 | 421.9 | 2.33 |
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| json | 5.32 | 188 | 5.22 |
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| orjson | 1 | 997.4 | 1 |
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| ujson | 2.54 | 394.1 | 2.53 |
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| rapidjson | 2.38 | 419.5 | 2.38 |
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| json | 5.26 | 190 | 5.25 |
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#### github.json deserialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 0.23 | 4310.6 | 1 |
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| ujson | 0.23 | 4414.3 | 0.98 |
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| rapidjson | 0.23 | 4229.4 | 1 |
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| json | 0.23 | 4176.3 | 1 |
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#### github.json serialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 0.06 | 16357.9 | 1 |
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| ujson | 0.13 | 7531.2 | 2.17 |
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| rapidjson | 0.16 | 6362.9 | 2.57 |
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| json | 0.23 | 4242.5 | 3.8 |
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#### twitter.json deserialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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|-----------|-------------------------|-------------------------|----------------------|
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| orjson | 2.98 | 335.3 | 1.25 |
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| ujson | 2.39 | 419.3 | 1 |
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| rapidjson | 3.12 | 318.8 | 1.31 |
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| json | 3.12 | 318.8 | 1.31 |
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| orjson | 2.6 | 385.5 | 1 |
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| ujson | 2.98 | 336.5 | 1.15 |
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| rapidjson | 2.84 | 339.1 | 1.09 |
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| json | 2.84 | 345.9 | 1.09 |
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#### twitter.json serialization
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| Library | Median (milliseconds) | Operations per second | Relative (latency) |
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| orjson | 0.55 | 1815.1 | 1 |
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| ujson | 1.46 | 684.9 | 2.65 |
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| rapidjson | 1.55 | 643.9 | 2.82 |
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| json | 2.18 | 458.7 | 3.95 |
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| orjson | 0.56 | 1790 | 1 |
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| ujson | 1.44 | 693.9 | 2.58 |
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| rapidjson | 1.57 | 636.1 | 2.82 |
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| json | 2.21 | 452 | 3.96 |
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This was measured using orjson 1.0.0 on Python 3.7.1. The above can be
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This was measured using orjson 1.2.0 on Python 3.7.1 and Linux. The above can be
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reproduced using the `pybench` and `graph` scripts.
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## License

‎doc/canada-serialize.png‎

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