When cloning a pinned tab, please unpin the cloned tab. (Obviously it makes no (or not much) sense to have several cloned and pinned tabs of the same URI).

Thanks for considering.

– Tom

I've seen the leak three or four times more yesterday, while in Opera Beta or Dev. Apparently not related to the content of the page, but I might be wrong here. Before that I thought it had to do with Discourse, but it happened also on other pages, even with only "opera:sync-internals" open.

But it is definitely not related to Gmail.

Anyway, I don't care much anymore. In the meantime Opera exposed so many other technical problems and design problems that I moved on to Vivaldi. This thing is felt 50× better than Opera and might be a worthy candidate for my future default browser. (Well, currently it already is my default browser, but still on a trial level.)

Nevertheless many thanks for your replies and support efforts, @leocg

Bye

@leocg, thanks for your reply. Any link to that release post?

In case you mean this:

Known issue:

[Mac] Memory leak from gmail
Please report if you encounter any memory consumption issues using Gmail. We are currently investigating the issue.

I don't use Gmail.

The new Beta (62.0.3331.5) seems to have a serious runaway memory (or leak) problem:

Could reproduce this several times by just surfing this forum in a single tab for a couple of minutes, and no extensions except the default ad-blocker.

The release version (60.0.3255.141) runs fine.

macOS 10.14.5