Well, nice test, some thoughts to it from an Opera user's point-of-view:
- the release of Opera 10.5 was hurried because of the ballot screen deadline. It's not good, but I can understand that, at least, they have a good reason (better than with 9.50). That could lead to some strange problems.
- The new JS engine (Carakan) is more RAM consuming. Opera uses dinamic memory management, if you have more RAM, it takes more RAM. I have 3GB-s and Opera consumes about 250-300MB almost constantly. I don't care... On the other hand, Opera is very scalable in this matter, think of the Mobile version which uses (almost) the same core. Opera is indeed very good for older machines.
- V8 benchmark should be disqualified as it heavily biased toward Chrome. It is now, and it was even more biased when it came out (Chrome was about 10 times faster than anybody else).
- It should be noted that SunSpider should be run with C'n'Q disabled(!) as its short tests fakes the results. Or you should go with its newest iteration, the 0.9.1 (see here:
http://www2.webkit.org/perf/sunspider-0.9.1/sunspider.html )
- Dromaeo might have some bugs. Opera is superfast there in one complex benchmark, the Regular Expressions. The final 10.5 locks up, but earlier development snapshots worked just fine, and the results were the same. You can see my results of the Regular expression test here (not with Opera 10.5 final, but pre-alpha):
http://m.blog.hu/ma/magyaropera/image/carakan/opera105_dromaeo_regular.png , and all the other here:
http://m.blog.hu/ma/magyaropera/image/carakan/opera105_dromaeo_detailed.png (big pic!)
- Peacekeeper does not take Complex Graphics benchmark into account because IE is not capable to run it. I find this to be ridiculous. Opera wins that test clearly:
http://m.blog.hu/ma/magyaropera/image/carakan/opera105_peacekeeper_detailed.png (for me, Chrome played better in total)
- Chrome 5 is much faster in some cases than Chrome 4