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‎CHANGELOG.md‎

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# Changelog
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## 3.2.1 - 2020-07-03
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### Fixed
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- Fix `orjson.dumps(..., **{})` raising `TypeError` on python3.6.
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## 3.2.0 - 2020-06-30
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### Added

‎Cargo.lock‎

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‎Cargo.toml‎

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[package]
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name = "orjson"
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version = "3.2.0"
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version = "3.2.1"
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authors = ["ijl <ijl@mailbox.org>"]
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description = "Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy"
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edition = "2018"

‎README.md‎

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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 0.58 | 1706.8 | 1 |
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| ujson | 2.09 | 473 | 3.58 |
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| rapidjson | 2.47 | 403.4 | 4.23 |
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| simplejson | 3.22 | 308.5 | 5.51 |
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| json | 3.33 | 300 | 5.69 |
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| orjson | 0.58 | 1734 | 1 |
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| ujson | 2.11 | 472.8 | 3.66 |
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| rapidjson | 2.38 | 419.1 | 4.13 |
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| simplejson | 3.32 | 301.1 | 5.75 |
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| json | 3.34 | 299.4 | 5.78 |
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#### twitter.json deserialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 2.61 | 383 | 1 |
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| ujson | 2.83 | 353 | 1.09 |
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| rapidjson | 3.75 | 266.8 | 1.44 |
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| simplejson | 3.26 | 306.8 | 1.25 |
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| json | 3.79 | 263.8 | 1.45 |
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| orjson | 2.43 | 411.8 | 1 |
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| ujson | 2.91 | 344.1 | 1.2 |
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| rapidjson | 3.84 | 259.8 | 1.58 |
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| simplejson | 3.59 | 277.1 | 1.48 |
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| json | 4.18 | 239.3 | 1.72 |
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#### github.json serialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 0.07 | 14806.2 | 1 |
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| ujson | 0.21 | 4850 | 3.05 |
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| rapidjson | 0.27 | 3746.4 | 3.94 |
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| simplejson | 0.45 | 2221.1 | 6.66 |
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| json | 0.36 | 2749.4 | 5.38 |
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| orjson | 0.06 | 15386.9 | 1 |
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| ujson | 0.22 | 4578.4 | 3.36 |
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| rapidjson | 0.26 | 3845.2 | 4 |
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| simplejson | 0.44 | 2272.3 | 6.78 |
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| json | 0.35 | 2844.6 | 5.4 |
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#### github.json deserialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 0.22 | 4617.1 | 1 |
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| ujson | 0.27 | 3715.6 | 1.25 |
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| rapidjson | 0.31 | 3189.1 | 1.45 |
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| simplejson | 0.29 | 3505.5 | 1.32 |
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| json | 0.32 | 3161.7 | 1.46 |
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| orjson | 0.2 | 5094.7 | 1 |
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| ujson | 0.29 | 3491.9 | 1.46 |
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| rapidjson | 0.33 | 3033 | 1.68 |
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| simplejson | 0.29 | 3501.7 | 1.46 |
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| json | 0.3 | 3326.7 | 1.53 |
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#### citm_catalog.json serialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 1 | 1005 | 1 |
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| ujson | 3.63 | 275.6 | 3.64 |
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| rapidjson | 3.5 | 287.1 | 3.51 |
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| simplejson | 10.98 | 89.8 | 11.04 |
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| json | 6.95 | 141.4 | 6.98 |
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| orjson | 1.01 | 993.3 | 1 |
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| ujson | 3.65 | 274.2 | 3.62 |
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| rapidjson | 3.56 | 281 | 3.54 |
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| simplejson | 11.5 | 86.2 | 11.43 |
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| json | 6.92 | 144.3 | 6.87 |
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#### citm_catalog.json deserialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 4.48 | 223.1 | 1 |
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| ujson | 5.57 | 179.4 | 1.24 |
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| rapidjson | 7.52 | 132.4 | 1.68 |
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| simplejson | 7.41 | 134.6 | 1.65 |
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| json | 7.92 | 126.2 | 1.77 |
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| orjson | 4.31 | 232.2 | 1 |
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| ujson | 5.6 | 178.6 | 1.3 |
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| rapidjson | 7.53 | 132.8 | 1.75 |
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| simplejson | 7.58 | 131.9 | 1.76 |
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| json | 7.75 | 128.9 | 1.8 |
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#### canada.json serialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 4.61 | 217.1 | 1 |
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| ujson | 19.2 | 53.2 | 4.17 |
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| rapidjson | 60.74 | 16.4 | 13.19 |
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| simplejson | 78.13 | 12.7 | 16.97 |
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| json | 62.48 | 16 | 13.57 |
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| orjson | 4.64 | 215.5 | 1 |
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| ujson | 19.64 | 51.5 | 4.23 |
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| rapidjson | 61.51 | 16.3 | 13.26 |
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| simplejson | 80.02 | 12.5 | 17.25 |
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| json | 61.46 | 16.3 | 13.25 |
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#### canada.json deserialization
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| Library | Median latency (milliseconds) | Operations per second | Relative (latency) |
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|------------|---------------------------------|-------------------------|----------------------|
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| orjson | 9.95 | 100.9 | 1 |
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| ujson | 15.73 | 63.7 | 1.58 |
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| rapidjson | 37.59 | 26.6 | 3.78 |
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| simplejson | 36.12 | 27.7 | 3.63 |
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| json | 37.66 | 26.6 | 3.79 |
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| orjson | 9.82 | 102 | 1 |
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| ujson | 16.56 | 60.5 | 1.69 |
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| rapidjson | 38.17 | 26.1 | 3.89 |
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| simplejson | 37.11 | 26.9 | 3.78 |
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| json | 37.98 | 27.1 | 3.87 |
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### Memory
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### Reproducing
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The above was measured using Python 3.8.2 on Linux (x86_64) with
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orjson 3.0.0, ujson 2.0.3, python-rapidson 0.9.1, and simplejson 3.17.0.
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The above was measured using Python 3.8.3 on Linux (x86_64) with
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orjson 3.2.1, ujson 3.0.0, python-rapidson 0.9.1, and simplejson 3.17.0.
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The latency results can be reproduced using the `pybench` and `graph`
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scripts. The memory results can be reproduced using the `pymem` script.

‎doc/canada_deserialization.png‎

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‎doc/canada_serialization.png‎

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‎doc/citm_catalog_deserialization.png‎

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‎doc/citm_catalog_serialization.png‎

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‎doc/github_deserialization.png‎

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‎doc/github_serialization.png‎

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