mirror of
https://github.com/lovell/sharp.git
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2.3 KiB
2.3 KiB
Performance
Test environment
- AWS EC2 c4.xlarge
- Amazon Linux AMI 2015.09
- Node.js v4.1.2
The contenders
- jimp v0.2.8 - Image processing in pure JavaScript.
- lwip v0.0.8 - Wrapper around CImg, compiles dependencies from source.
imagemagick-native- Wrapper around libmagick++, supports Buffers only. Does not currently work with Node.js v4.- imagemagick v0.1.3 - Supports filesystem only and "has been unmaintained for a long time".
- gm v1.20.0 - Fully featured wrapper around GraphicsMagick's
convertcommand line utility. - sharp v0.11.3 / libvips v8.1.0 - Caching within libvips disabled to ensure a fair comparison.
The task
Decompress a 2725x2225 JPEG image, resize to 720x480 using bilinear interpolation, then compress to JPEG.
Results
| Module | Input | Output | Ops/sec | Speed-up |
|---|---|---|---|---|
| jimp | file | file | 0.94 | 1.0 |
| jimp | buffer | buffer | 1.12 | 1.2 |
| lwip | file | file | 1.12 | 1.2 |
| lwip | buffer | buffer | 1.13 | 1.2 |
| gm | buffer | buffer | 5.50 | 5.9 |
| gm | file | file | 5.55 | 5.9 |
| imagemagick | file | file | 8.66 | 9.2 |
| sharp | stream | stream | 16.33 | 17.4 |
| sharp | file | file | 16.88 | 18.0 |
| sharp | file | buffer | 16.90 | 18.1 |
| sharp | buffer | file | 16.99 | 18.1 |
| sharp | buffer | buffer | 17.06 | 18.1 |
Greater performance can be expected with caching enabled (default) and using 8+ core machines.
The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
Benchmark test prerequisites
Requires both ImageMagick and GraphicsMagick:
brew install imagemagick
brew install graphicsmagick
sudo apt-get install imagemagick graphicsmagick libmagick++-dev
Running the benchmark test
git clone https://github.com/lovell/sharp.git
cd sharp
npm install
cd test/bench
npm install
npm test