Use VIPS (http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS) for large TIFF conversion. It should handle

Use VIPS (http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS) for large TIFF conversion. It should handle them much, much faster. Also, I think there was a write-up on highscalability.com about instagram, or pinterest, or someone resizing a ton of images a while ago.