You think Opera's using too much memory in your case?
Come back when one single process eats almost 1 GB of RAM.opera Gpu process.JPG
Takes a few hours of running time to get there, but it almost never decreases. So I just kill the process every hour or two (restarts automatically) to keep its memory consumption within reasonable limits. The times when Opera was noticeably the least resources-hungry browser on the market are over.