mirror of
https://github.com/lovell/sharp.git
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74 lines
2.7 KiB
Markdown
74 lines
2.7 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 AMI 2016.03.1 (HVM), SSD Volume Type
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* Node.js v6.2.0
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### The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.2.24 - 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 dependencies from source.
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* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) v1.9.2 - 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) v1.22.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* sharp v0.15.0 / libvips v8.3.1 - 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 720x480 using Lanczos 3 resampling (where available),
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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 (bilinear) | file | file | 0.94 | 1.0 |
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| jimp (bilinear) | buffer | buffer | 0.98 | 1.0 |
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| lwip | file | file | 1.14 | 1.2 |
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| lwip | buffer | buffer | 1.14 | 1.2 |
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| imagemagick-native | buffer | buffer | 1.66 | 1.8 |
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| imagemagick | file | file | 5.08 | 5.4 |
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| gm | buffer | buffer | 5.43 | 5.7 |
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| gm | file | file | 5.46 | 5.8 |
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| sharp | stream | stream | 26.52 | 28.2 |
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| sharp | file | file | 28.16 | 30.0 |
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| sharp | file | buffer | 28.27 | 30.1 |
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| sharp | buffer | file | 28.42 | 30.2 |
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| sharp | buffer | buffer | 28.42 | 30.2 |
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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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