Vivaldi 1.8 - still a snail
Nothing changed, unfortunately. Run Vivaldi for a day, then open a Google Sheet - takes minimum 10sec to become responsive and CPU is maxed out during that time. Force quit and restart with all the same tabs open and it takes only a second before you can start editing the worksheet.
Please report this as a bug.
How to do a bugreport for Vivaldi
Report the bug at https://vivaldi.com/bugreport/
Describe the issue as precise as you can.
If you use any extensions please give information which ones you use.
If you have a URL or a own testpage which can checked, add it to the bugreport.
If you have own testcase files (HTML, CSS, JS etc.) add them to the confirmation mail you get after report.
If you have a screenrecording video, you can attach it to give the developers a hint how this might happen or look like.
You will get a bug confirmation mail and in a reply to this mail you can add more information and files as attachments for the testers and bug tracking team.
Thanks in advance for helping us to make Vivaldi better!