Here are some speed tests from the Peacekeeper Benchmark test:
Opera 10.6 includes several new HTML5 APIs along with other web standard implementations. Here are the news ones:
- Offline Web Applications
- Web Workers
- Cross-Document Messaging
The Geolocation standard was partially implemented on FreeBSD and Linux, but now it works across all operating systems. The browser alerts you when a site requests Geolocation information. You can then accept or deny the request.
The AppCache for offline applications blurs the line between desktop and web apps. Opera also plans to build this functionality into their debugging tool, Dragonfly. You'll be able to debug offline once this feature is implemented.
In the UI, Opera has simplified certain tabs like history and home with icons instead of thumbnails. Mac plugins should perform better in 10.6. Opera also added support for a few CSS properties with vendor prefixes.
Linux users will notice that Opera is skipping 10.5x on Linux to get all the platforms in step again.