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‎CHANGELOG.md‎

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# Changelog
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## 2.2.1 - 2020-02-04
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### Fixed
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- `orjson.loads()` rejects floats that do not have a digit following
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the decimal, e.g., `-2.`, `2.e-3`.
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### Changed
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- Build Linux, macOS, and Windows wheels on more recent distributions.
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## 2.2.0 - 2020-01-22
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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 = "2.2.0"
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version = "2.2.1"
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authors = ["ijl <ijl@mailbox.org>"]
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description = "Fast, correct Python JSON library supporting dataclasses and datetimes"
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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 | 0.75 | 1297.5 | 1 |
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| ujson | 2.06 | 483.5 | 2.74 |
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| rapidjson | 2.12 | 470.7 | 2.82 |
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| simplejson | 3.55 | 275.2 | 4.73 |
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| json | 3.57 | 277.8 | 4.75 |
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| orjson | 0.74 | 1358.5 | 1 |
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| ujson | 1.95 | 511.1 | 2.65 |
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| rapidjson | 2.58 | 387.1 | 3.51 |
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| simplejson | 3.49 | 287 | 4.74 |
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| json | 3.4 | 294.4 | 4.61 |
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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 | 3.29 | 302.3 | 1 |
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| ujson | 3.65 | 281.2 | 1.11 |
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| rapidjson | 5.6 | 179.1 | 1.7 |
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| simplejson | 5.19 | 188.3 | 1.58 |
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| json | 5.62 | 184.2 | 1.71 |
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| orjson | 2.74 | 364.5 | 1 |
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| ujson | 3.01 | 332.7 | 1.1 |
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| rapidjson | 3.98 | 251.1 | 1.45 |
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| simplejson | 3.64 | 275.5 | 1.33 |
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| json | 4.27 | 234.5 | 1.56 |
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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 | 0.08 | 12363.5 | 1 |
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| ujson | 0.2 | 4834.3 | 2.55 |
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| rapidjson | 0.23 | 4385.4 | 2.84 |
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| simplejson | 0.42 | 2360.3 | 5.28 |
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| json | 0.36 | 2709.1 | 4.53 |
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| orjson | 0.08 | 12278.6 | 1 |
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| ujson | 0.19 | 5243.6 | 2.33 |
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| rapidjson | 0.29 | 3427.9 | 3.57 |
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| simplejson | 0.47 | 2125.3 | 5.77 |
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| json | 0.36 | 2774.1 | 4.4 |
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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 | 0.25 | 3992.4 | 1 |
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| ujson | 0.32 | 3065.1 | 1.28 |
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| rapidjson | 0.42 | 2400.2 | 1.68 |
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| simplejson | 0.3 | 3293.5 | 1.21 |
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| json | 0.38 | 2410 | 1.54 |
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| orjson | 0.23 | 4300.7 | 1 |
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| ujson | 0.29 | 3459.3 | 1.24 |
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| rapidjson | 0.33 | 2980.8 | 1.43 |
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| simplejson | 0.31 | 3186.4 | 1.36 |
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| json | 0.35 | 2892.5 | 1.5 |
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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 | 1.27 | 746.2 | 1 |
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| ujson | 3.63 | 257.1 | 2.86 |
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| rapidjson | 3.52 | 279.8 | 2.77 |
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| simplejson | 14.37 | 66.6 | 11.31 |
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| json | 8.28 | 120.2 | 6.52 |
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| orjson | 1.21 | 835 | 1 |
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| ujson | 3.33 | 299.9 | 2.76 |
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| rapidjson | 3.8 | 264.8 | 3.14 |
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| simplejson | 12.12 | 82.7 | 10.02 |
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| json | 7.81 | 129 | 6.46 |
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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 | 5.61 | 175.8 | 1 |
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| ujson | 6.78 | 146.8 | 1.21 |
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| rapidjson | 7.71 | 129.4 | 1.37 |
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| simplejson | 9.01 | 108.8 | 1.61 |
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| json | 8.49 | 116.1 | 1.51 |
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| orjson | 5.25 | 190.5 | 1 |
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| ujson | 6.49 | 154.1 | 1.24 |
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| rapidjson | 8 | 124.9 | 1.52 |
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| simplejson | 7.94 | 125.7 | 1.51 |
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| json | 8.62 | 116.1 | 1.64 |
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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 | 5.28 | 189.6 | 1 |
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| orjson | 5.54 | 180.6 | 1 |
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| ujson | | | |
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| rapidjson | 69.38 | 14.3 | 13.14 |
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| simplejson | 99.43 | 9.4 | 18.84 |
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| json | 76.44 | 12.9 | 14.48 |
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| rapidjson | 70.29 | 14.4 | 12.69 |
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| simplejson | 90.03 | 11.2 | 16.25 |
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| json | 73.39 | 13.6 | 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 | 22.22 | 45.1 | 1 |
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| orjson | 19.6 | 51 | 1 |
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| ujson | | | |
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| rapidjson | 44.56 | 21.4 | 2.01 |
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| simplejson | 42.99 | 23.2 | 1.93 |
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| json | 44.69 | 21.4 | 2.01 |
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| rapidjson | 42.02 | 23.9 | 2.14 |
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| simplejson | 40.19 | 24.9 | 2.05 |
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| json | 41.5 | 24.1 | 2.12 |
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If a row is blank, the library did not serialize and deserialize the fixture without
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modifying it, e.g., returning different values for floating point numbers.
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| Library | import, read() RSS (MiB) | loads() increase in RSS (MiB) |
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|------------|----------------------------|---------------------------------|
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| orjson | 12.9 | 2.8 |
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| ujson | 12.8 | 4.6 |
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| rapidjson | 14.5 | 6.5 |
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| simplejson | 13.1 | 2.7 |
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| json | 12.5 | 2.4 |
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| orjson | 13.7 | 2.4 |
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| ujson | 13.4 | 4 |
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| rapidjson | 14.8 | 6.5 |
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| simplejson | 13.3 | 2.5 |
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| json | 12.8 | 2.6 |
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#### github.json
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| Library | import, read() RSS (MiB) | loads() increase in RSS (MiB) |
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|------------|----------------------------|---------------------------------|
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| orjson | 12.3 | 0.3 |
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| ujson | 12.6 | 0.5 |
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| rapidjson | 13.9 | 0.4 |
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| orjson | 12.9 | 0.3 |
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| ujson | 12.5 | 0.4 |
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| rapidjson | 13.9 | 0.6 |
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| simplejson | 12.5 | 0.3 |
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| json | 11.7 | 0.3 |
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| json | 12.1 | 0.4 |
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#### citm_catalog.json
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| Library | import, read() RSS (MiB) | loads() increase in RSS (MiB) |
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|------------|----------------------------|---------------------------------|
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| orjson | 13.7 | 8.5 |
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| ujson | 13.9 | 12 |
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| rapidjson | 15.4 | 30.2 |
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| simplejson | 14.1 | 25 |
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| json | 13.5 | 24.9 |
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| orjson | 14.6 | 7.7 |
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| ujson | 14.5 | 10.8 |
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| rapidjson | 15.7 | 26.1 |
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| simplejson | 14.3 | 16 |
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| json | 14.1 | 24.1 |
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#### canada.json
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| Library | import, read() RSS (MiB) | loads() increase in RSS (MiB) |
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|------------|----------------------------|---------------------------------|
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| orjson | 16.5 | 17.5 |
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| orjson | 17.1 | 15.7 |
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| ujson | | |
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| rapidjson | 17.9 | 19.6 |
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| simplejson | 16.6 | 21.3 |
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| json | 16.0 | 21.3 |
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| rapidjson | 18.1 | 17.9 |
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| simplejson | 16.8 | 19.6 |
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| json | 16.5 | 19.5 |
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### Reproducing
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The above was measured using Python 3.7.4 on Linux with orjson 2.1.0,
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ujson 1.35, python-rapidson 0.8.0, and simplejson 3.16.0.
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The above was measured using Python 3.8.1 on Linux with orjson 2.2.1,
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ujson 1.35, 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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