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Docs: update benchmarks for latest versions, add ARM64 results
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‎docs/performance.md‎

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A test to benchmark the performance of this module relative to alternatives.
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Greater libvips performance can be expected with caching enabled (default)
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and using 8+ core machines, especially those with larger L1/L2 CPU caches.
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The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
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## The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.16.1 - Image processing in pure JavaScript. Provides bicubic interpolation.
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* [mapnik](https://www.npmjs.org/package/mapnik) v4.5.9 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
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* [jimp](https://www.npmjs.com/package/jimp) v0.16.2 - Image processing in pure JavaScript. Provides bicubic interpolation.
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* [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
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* [gm](https://www.npmjs.com/package/gm) v1.23.1 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* [gm](https://www.npmjs.com/package/gm) v1.25.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* [@squoosh/lib](https://www.npmjs.com/package/@squoosh/lib) v0.4.0 - Image libraries transpiled to WebAssembly, includes GPLv3 code.
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* [@squoosh/cli](https://www.npmjs.com/package/@squoosh/cli) v0.7.2 - Command line wrapper around `@squoosh/lib`, avoids GPLv3 by spawning process.
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* sharp v0.31.0 / libvips v8.13.1 - Caching within libvips disabled to ensure a fair comparison.
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* sharp v0.31.3 / libvips v8.13.3 - Caching within libvips disabled to ensure a fair comparison.
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## The task
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Decompress a 2725x2225 JPEG image,
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resize to 720x588 using Lanczos 3 resampling (where available),
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then compress to JPEG at a "quality" setting of 80.
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## Test environment
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## Results
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* AWS EC2 eu-west-1 [c6a.xlarge](https://aws.amazon.com/ec2/instance-types/c6a/) (4x AMD EPYC 7R13)
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* Ubuntu 22.04 (ami-051f7c00cb18501ee)
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* Node.js 16.17.0
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### AMD64
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## Results
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* AWS EC2 eu-west-1 [c6a.xlarge](https://aws.amazon.com/ec2/instance-types/c6a/) (4x AMD EPYC 7R13)
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* Ubuntu 22.04 (ami-026e72e4e468afa7b)
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* Node.js 16.19.0
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| jimp | buffer | buffer | 0.96 | 1.0 |
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| squoosh-cli | file | file | 1.10 | 1.1 |
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| squoosh-lib | buffer | buffer | 1.87 | 1.9 |
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| mapnik | buffer | buffer | 3.48 | 3.6 |
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| gm | buffer | buffer | 8.53 | 8.9 |
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| gm | file | file | 8.60 | 9.0 |
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| imagemagick | file | file | 9.30 | 9.7 |
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| sharp | stream | stream | 32.86 | 34.2 |
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| sharp | file | file | 34.82 | 36.3 |
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| sharp | buffer | buffer | 35.41 | 36.9 |
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| jimp | buffer | buffer | 0.82 | 1.0 |
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| squoosh-cli | file | file | 1.05 | 1.3 |
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| squoosh-lib | buffer | buffer | 1.19 | 1.5 |
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| gm | buffer | buffer | 8.47 | 10.3 |
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| gm | file | file | 8.58 | 10.5 |
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| imagemagick | file | file | 9.23 | 11.3 |
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| sharp | stream | stream | 33.23 | 40.5 |
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| sharp | file | file | 35.22 | 43.0 |
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| sharp | buffer | buffer | 35.70 | 43.5 |
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Greater libvips performance can be expected with caching enabled (default)
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and using 8+ core machines, especially those with larger L1/L2 CPU caches.
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### ARM64
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The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
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* AWS EC2 eu-west-1 [c7g.xlarge](https://aws.amazon.com/ec2/instance-types/c7g/) (4x ARM Graviton3)
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* Ubuntu 22.04 (ami-02142ceceb3933ff5)
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* Node.js 16.19.0
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| jimp | buffer | buffer | 0.84 | 1.0 |
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| squoosh-cli | file | file | 1.12 | 1.3 |
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| squoosh-lib | buffer | buffer | 2.11 | 2.5 |
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| gm | buffer | buffer | 10.39 | 12.4 |
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| gm | file | file | 10.40 | 12.4 |
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| imagemagick | file | file | 10.73 | 12.8 |
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| sharp | stream | stream | 33.63 | 40.0 |
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| sharp | file | file | 34.91 | 41.6 |
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| sharp | buffer | buffer | 35.72 | 42.5 |
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## Running the benchmark test
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