mirror of
https://github.com/lovell/sharp.git
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71 lines
2.6 KiB
Markdown
71 lines
2.6 KiB
Markdown
# Performance
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### Test environment
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* AWS EC2 [c4.xlarge](http://aws.amazon.com/ec2/instance-types/#c4) (4x E5-2666 v3 @2.90GHz)
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* Amazon Linux 2015.09.1
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* Node.js v5.1.0
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### The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.2.19 - Image processing in pure JavaScript. Bilinear interpolation only.
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* [lwip](https://www.npmjs.com/package/lwip) v0.0.8 - Wrapper around CImg, compiles dependencies from source.
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* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) @5ab570e - 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) v1.21.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* sharp v0.12.0 / libvips v8.1.1 - Caching within libvips disabled to ensure a fair comparison.
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### The task
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Decompress a 2725x2225 JPEG image, resize to 720x480 using bicubic interpolation (where available), then compress to JPEG.
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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 | file | file | 0.99 | 1.0 |
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| jimp | buffer | buffer | 1.05 | 1.1 |
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| lwip | file | file | 1.13 | 1.1 |
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| lwip | buffer | buffer | 1.13 | 1.1 |
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| imagemagick-native | buffer | buffer | 1.67 | 1.7 |
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| imagemagick | file | file | 5.19 | 5.2 |
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| gm | buffer | buffer | 5.56 | 5.6 |
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| gm | file | file | 5.59 | 5.6 |
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| sharp | stream | stream | 21.91 | 22.1 |
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| sharp | file | file | 22.79 | 23.0 |
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| sharp | file | buffer | 22.91 | 23.1 |
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| sharp | buffer | file | 23.03 | 23.3 |
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| sharp | buffer | buffer | 23.15 | 23.4 |
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Greater performance can be expected with caching enabled (default) and using 8+ core machines.
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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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