I love the idea of this plugin, but it slows the upload process up and sometimes I can't upload at all. I would expect it would be slower since it is processing the images, but it doesn't help if it won't complete the upload process. When I deactivate the plugin, all is well.
Also, I already downsize photos before I upload them so this is not an issue of too big a file size.
Are there any tricks to making this work efficiently?