mirror of
https://github.com/lovell/sharp.git
synced 2025-07-09 18:40:16 +02:00
d26f6b3b89
Add structure via mkdocs (replaces ever-growing README) Inline usage examples with the method they demonstrate Add changelog
64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
# Performance
|
|
|
|
### Test environment
|
|
|
|
* AWS EC2 [c4.xlarge](http://aws.amazon.com/ec2/instance-types/#c4)
|
|
* Ubuntu 15.04
|
|
* Node.js 0.12.7
|
|
* libvips 8.0.2
|
|
* liborc 0.4.22
|
|
|
|
### The contenders
|
|
|
|
* [lwip](https://www.npmjs.com/package/lwip) 0.0.7 - Wrapper around CImg, compiles dependencies from source
|
|
* [imagemagick-native](https://www.npmjs.com/package/imagemagick-native) git@45d4e2e - Wrapper around libmagick++, supports Buffers only.
|
|
* [imagemagick](https://www.npmjs.com/package/imagemagick) 0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
|
|
* [gm](https://www.npmjs.com/package/gm) 1.18.1 - Fully featured wrapper around GraphicsMagick's `convert` command line utility.
|
|
* sharp 0.11.0 - 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 |
|
|
| :----------------- | :----- | :----- | ------: | -------: |
|
|
| lwip | file | file | 1.75 | 1 |
|
|
| lwip | buffer | buffer | 2.21 | 1.3 |
|
|
| imagemagick-native | buffer | buffer | 7.13 | 4.1 |
|
|
| gm | buffer | buffer | 7.27 | 4.2 |
|
|
| gm | file | file | 7.33 | 4.2 |
|
|
| imagemagick | file | file | 10.04 | 5.7 |
|
|
| sharp | stream | stream | 23.12 | 13.2 |
|
|
| sharp | file | file | 24.43 | 14.0 |
|
|
| sharp | file | buffer | 24.55 | 14.0 |
|
|
| sharp | buffer | file | 24.86 | 14.2 |
|
|
| sharp | buffer | buffer | 24.92 | 14.2 |
|
|
|
|
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_:
|
|
|
|
```sh
|
|
brew install imagemagick
|
|
brew install graphicsmagick
|
|
```
|
|
|
|
```sh
|
|
sudo apt-get install imagemagick graphicsmagick libmagick++-dev
|
|
```
|
|
|
|
### Running the benchmark test
|
|
|
|
```sh
|
|
git clone https://github.com/lovell/sharp.git
|
|
cd sharp/test/bench
|
|
npm install
|
|
npm test
|
|
```
|