mirror of
https://github.com/lovell/sharp.git
synced 2025-07-09 18:40:16 +02:00
66 lines
2.3 KiB
Markdown
66 lines
2.3 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)
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* Amazon Linux AMI 2015.09
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* Node.js v4.1.2
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### The contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.2.8 - Image processing in pure JavaScript.
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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)~~ - Wrapper around libmagick++, supports Buffers only. Does not currently work with Node.js v4.
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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) v1.20.0 - Fully featured wrapper around GraphicsMagick's `convert` command line utility.
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* sharp v0.11.3 / libvips v8.1.0 - 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 bilinear interpolation, 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 | 0.94 | 1.0 |
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| jimp | buffer | buffer | 1.12 | 1.2 |
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| lwip | file | file | 1.12 | 1.2 |
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| lwip | buffer | buffer | 1.13 | 1.2 |
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| gm | buffer | buffer | 5.50 | 5.9 |
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| gm | file | file | 5.55 | 5.9 |
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| imagemagick | file | file | 8.66 | 9.2 |
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| sharp | stream | stream | 16.33 | 17.4 |
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| sharp | file | file | 16.88 | 18.0 |
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| sharp | file | buffer | 16.90 | 18.1 |
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| sharp | buffer | file | 16.99 | 18.1 |
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| sharp | buffer | buffer | 17.06 | 18.1 |
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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 graphicsmagick libmagick++-dev
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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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