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tech preview was great for me being both faster and more reliable than blue up until the last version and it just went to H all the sudden. Flash issues, page loading issues, crashes, etc. It was somewhat coincidental with Sierra so perhaps they have fixed these issues already or having not fresh installed Sierra I have something configured wrong. I might give it a try again in a few versions to see.
 
Well the Safari Technology Preview 15 gets 415 points on html5test.com, which is the first time Safari has been able to get 400 or more points. Safari 9 had a score of 360, Safari 9.1 had a score of 370 and Safari 10 managed a score of 383 points. So, Safari is headed in the right direction, only a bit slower than I would have preferred.

Just ran html5test.com on a $40 2013 Moto G1 and it scored 498. For comparison, on my iPad it scores 370'ish. A bit embarassing for Safari. On mobile Safari Apple also needs to fix the slow as molasses inertial scrolling since there's no reason a $40 2013 Android device should out scroll the latest iPhone 7.
 
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