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Performance

A test to benchmark the performance of this module relative to alternatives.

Greater libvips performance can be expected with caching enabled (default) and using 8+ core machines, especially those with larger L1/L2 CPU caches.

The I/O limits of the relevant (de)compression library will generally determine maximum throughput.

The contenders

  • jimp v0.16.2 - Image processing in pure JavaScript. Provides bicubic interpolation.
  • imagemagick v0.1.3 - Supports filesystem only and "has been unmaintained for a long time".
  • gm v1.25.0 - Fully featured wrapper around GraphicsMagick's gm command line utility.
  • @squoosh/lib v0.4.0 - Image libraries transpiled to WebAssembly, includes GPLv3 code.
  • @squoosh/cli v0.7.2 - Command line wrapper around @squoosh/lib, avoids GPLv3 by spawning process.
  • sharp v0.31.3 / libvips v8.13.3 - Caching within libvips disabled to ensure a fair comparison.

The task

Decompress a 2725x2225 JPEG image, resize to 720x588 using Lanczos 3 resampling (where available), then compress to JPEG at a "quality" setting of 80.

Results

AMD64

  • AWS EC2 eu-west-1 c6a.xlarge (4x AMD EPYC 7R13)
  • Ubuntu 22.04 (ami-026e72e4e468afa7b)
  • Node.js 16.19.0
Module Input Output Ops/sec Speed-up
jimp buffer buffer 0.82 1.0
squoosh-cli file file 1.05 1.3
squoosh-lib buffer buffer 1.19 1.5
gm buffer buffer 8.47 10.3
gm file file 8.58 10.5
imagemagick file file 9.23 11.3
sharp stream stream 33.23 40.5
sharp file file 35.22 43.0
sharp buffer buffer 35.70 43.5

ARM64

  • AWS EC2 eu-west-1 c7g.xlarge (4x ARM Graviton3)
  • Ubuntu 22.04 (ami-02142ceceb3933ff5)
  • Node.js 16.19.0
Module Input Output Ops/sec Speed-up
jimp buffer buffer 0.84 1.0
squoosh-cli file file 1.12 1.3
squoosh-lib buffer buffer 2.11 2.5
gm buffer buffer 10.39 12.4
gm file file 10.40 12.4
imagemagick file file 10.73 12.8
sharp stream stream 33.63 40.0
sharp file file 34.91 41.6
sharp buffer buffer 35.72 42.5

Running the benchmark test

Requires Docker.

git clone https://github.com/lovell/sharp.git
cd sharp/test/bench
./run-with-docker.sh