UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10032.39.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.50 Safari/537.36
Platform: 10032.39.0

Steps to reproduce the problem:
1. Log into one persona (user account)
2. Use the sign into another user option to log into a secondary persona.
3. Launch 5-10 tabs in each persona and then use CTRL, ALT, < or > to switch between personas.

What is the expected behavior?
It should immediately and smoothly switch between each user account. It should not stutter or delay upon switching between personas. It also should not freeze randomly and become unresponsive. The 3 finger swipe-up gesture is also very delayed and choppy.

What went wrong?
It appears that each persona eats up a significant amount of RAM even on my 8GB RAM Pixelbook. Logged into 1 persona seems to work quite well. Logging into 2 personas, even with just Google Play Music running in 1 persona and the other persona having 5-10 tabs open at once, the computer randomly freeze and becomes very laggy.

Did this work before? N/A 

Chrome version: 63.0.3239.50  Channel: beta
OS Version: 63.0.3239.50
Flash Version: 

For the top-of-the-line chromebook on the market, it's crazy to not be able to use 2 personas at once, even if one is just doing something as minimal as playing music or running YouTube videos.

I have between 16-25 chrome extensions on each account, but most of them are very lightweight like "merge tabs" and "Authy", etc.

I can't even use the multi-persona on my Pixelbook because the performance is so significantly reduced which is disappointing. Not sure if it's a Memory leak issue or if the CPU can't keep up. It's not like anything is very CPU heavy though, just general tabbed browsing usage and some web apps.