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We've written programs using number of different image processing systems toload a TIFF image, crop 100 pixels off every edge, shrink by 10% with bilinearinterpolation, sharpen with a 3x3 convolution and save again. It's a trivialtest but it does give some idea of the speed and memory behaviour of theselibraries (and it's also quite fun to compare the code).

Bilinear interpolation is poor quality and no one would use it, but it isavailable everywhere.

1. Put your system into performance mode with eg.:

   echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

3. Install any packages you are missing with eg.:

sudo apt-get install imagemagick graphicsmagick libopencv-dev \python-imaging netpbm libfreeimage-dev \exactimage gegl composer libvips nip2

4. Make a venv for python and install the python and ruby packages

    python3 -m venv ~/vips    . ~/vips/bin/activate    pip install pyvips Pillow-SIMD gdlib gem install rmagick ruby-vips image_science

Then run the driver script:

./benchmark.sh

to generate the test image and run all the benchmarks.

The program is very simple and doesn't do much error checking. You'll needto look through the output and make sure everything is working correctly. Inparticular, make sure you have all the packages installed.

Thespeed and memory usepage on thelibvips website has a table of results.

The peakmem.pl program doesn't seem to be working correctly, investigate.