mirror of
https://github.com/lovell/sharp.git
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77 lines
3.0 KiB
Markdown
77 lines
3.0 KiB
Markdown
# Performance
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### Test environment
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* AWS EC2 eu-west-1 [c5.large](https://aws.amazon.com/ec2/instance-types/c5/) (2x Xeon Platinum 8124M CPU @ 3.00GHz)
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* Ubuntu 17.10 (hvm:ebs-ssd, 20180102, ami-0741d47e)
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* Node.js v8.9.4
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### The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.2.28 - Image processing in pure JavaScript. Bilinear interpolation only.
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* [pajk-lwip](https://www.npmjs.com/package/pajk-lwip) v0.2.0 (fork) - Wrapper around CImg that compiles dependencies from source.
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* [mapnik](https://www.npmjs.org/package/mapnik) v3.6.2 - Whilst primarily a map renderer, Mapnik contains bitmap image utilities.
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* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) v1.9.3 - Wrapper around libmagick++, supports Buffers only.
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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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* [images](https://www.npmjs.com/package/images) v3.0.1 - Compiles dependencies from source. Provides bicubic interpolation.
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* sharp v0.19.0 / libvips v8.6.1 - 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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### Results
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| jimp (bilinear) | buffer | buffer | 1.14 | 1.0 |
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| lwip | buffer | buffer | 1.86 | 1.6 |
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| mapnik | buffer | buffer | 3.34 | 2.9 |
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| imagemagick-native | buffer | buffer | 4.13 | 3.6 |
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| gm | buffer | buffer | 4.21 | 3.7 |
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| gm | file | file | 4.27 | 3.7 |
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| imagemagick | file | file | 4.67 | 4.1 |
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| images (bicubic) | file | file | 6.22 | 5.5 |
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| sharp | stream | stream | 24.43 | 21.4 |
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| sharp | file | file | 25.97 | 22.7 |
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| sharp | file | buffer | 26.00 | 22.8 |
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| sharp | buffer | file | 26.33 | 23.0 |
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| sharp | buffer | buffer | 26.43 | 23.1 |
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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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### Benchmark test prerequisites
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Requires _ImageMagick_, _GraphicsMagick_ and _Mapnik_:
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```sh
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brew install imagemagick
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brew install graphicsmagick
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brew install mapnik
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```
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```sh
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sudo apt-get install imagemagick libmagick++-dev graphicsmagick mapnik-dev
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```
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```sh
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sudo yum install ImageMagick-devel ImageMagick-c++-devel GraphicsMagick mapnik-devel
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```
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### Running the benchmark test
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```sh
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git clone https://github.com/lovell/sharp.git
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cd sharp
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npm install
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cd test/bench
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npm install
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npm test
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```
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