Improve performance of get_imageinfo

This is a performance tracker so a before and after comparison is needed: Setup To simulate expensive latency due to a remote file system hack get_imageinfo_from_path in lib/filestorage/file_system.php and add a sleep(1) just before getimagesize() . Before patch Navigate to any file picker such as /user/files.php and upload several images one by one Confirm as you upload each image loading the page will become progressively slower Reload the page You'll see that the page reloads slow (e.g. if you uploaded 3 images, it will take at least 3 seconds to load the page) After patch Apply the patch, purge caches Reload the page, the first reload will take a little longer Reload the page again and confirm the performance is back to being fast Add another image, confirm it is 1 second to load and then fast again on a reload