mirror of
https://github.com/lovell/sharp.git
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74 lines
2.8 KiB
Markdown
74 lines
2.8 KiB
Markdown
# Performance
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### Test environment
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* AWS EC2 eu-central-1 [c4.xlarge](http://aws.amazon.com/ec2/instance-types/#c4) (4x E5-2666 v3 @ 2.90GHz)
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* Ubuntu 16.04.1 LTS (HVM, SSD, 20161115, ami-82cf0aed)
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* Node.js v6.9.1
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### The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.2.27 - Image processing in pure JavaScript. Bilinear interpolation only.
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* [lwip](https://www.npmjs.com/package/lwip) v0.0.9 - Wrapper around CImg. Compiles outdated, insecure dependencies from source.
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* [mapnik](https://www.npmjs.org/package/mapnik) v3.5.14 - 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) v1.23.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* sharp v0.17.0 / libvips v8.4.2 - 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 | 1.06 | 1.0 |
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| lwip | buffer | buffer | 1.87 | 1.8 |
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| mapnik | buffer | buffer | 2.91 | 2.7 |
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| imagemagick-native | buffer | buffer | 4.03 | 3.8 |
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| imagemagick | file | file | 7.10 | 6.7 |
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| gm | buffer | buffer | 7.08 | 6.7 |
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| gm | file | file | 7.10 | 6.7 |
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| sharp | stream | stream | 27.61 | 26.0 |
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| sharp | file | file | 28.41 | 26.8 |
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| sharp | buffer | file | 28.71 | 27.1 |
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| sharp | file | buffer | 28.60 | 27.0 |
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| sharp | buffer | buffer | 29.08 | 27.4 |
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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 both _ImageMagick_ and _GraphicsMagick_:
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```sh
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brew install imagemagick
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brew install graphicsmagick
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```
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```sh
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sudo apt-get install imagemagick libmagick++-dev graphicsmagick
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```
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```sh
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sudo yum install ImageMagick-devel ImageMagick-c++-devel GraphicsMagick
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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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