After multiple reboots it's still being really laggy in Chrome for me, but is smooth in Firefox. Not sure what's up. Chrome version info below:
Google Chrome 55.0.2883.28 (Official Build) beta (64-bit)
Revision eec10a413008022b45380e6d0b44a1ac0b2ea414-refs/branch-heads/2883@{#305}
OS Windows
JavaScript V8 5.5.372.13
Flash 23.0.0.207
User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.28 Safari/537.36
Will do some more testing in Chrome on other machines and OS's tomorrow.