9 ms·

If all you need is crop or resize, might as well use nginx in my opinion.

• jhgg 11y ago
  There was one annoyance we have to fix that I don't think the nginx module supports & that's rotating images based on their exif orientation (mobile devices love to upload landscape images w/ an exif-orientation in portrait). Python is definitely an OK solution for this as it turns out. We resize a few million of images a day on-demand on two n1-highcpu-8 GCE instances. Although, they could easily be a fourth the size, as CPU generally peaks out at 20-25% during peak hours. We've actually tried more specialized services for this, like sharp + a threadpool using node.js and it actually performed terribly. As it turns out, blocking the gunicorn event loop by processing image resizes created a good amount of back-pressure to load balance incoming requests to each worker process.
  • coleifer 11y ago
    That's a good point. The nginx module can rotate, but I don't know of any built-in support for rotation with respect to exif. You could also use lua and the lua imagemagick bindings and probably see much better performance though.