In general the browser speed ranks usually end up looking something like this:
1. KHTML/WebKit (Safari, Konqueror, Swift, etc.)
2. Opera
3. Triton (Internet Explorer series)
4. Gecko (Firefox, Dillo, K-Meleon)
It's worth noting that that the ranks for rendering accuracy are quite different, looking something like this:
1. Opera
2. Gecko
3. KHTML/WebKit (the difference between it and Opera is closing very fast, however)
4. Triton
If Triton was put inside of a secure browser, and they patched up the rendering problems it has, it would be a very good engine.