Looks excellent. I have no data to back this up but it feels very crisp and fast in the browser.
I must say however that the idea having the orderbook on the left side of the screen is something I would have to get used to. This may sound silly but I like having the orderbook on the right side of the screen since that way new bars on the candlestick chart appear right next to the orderbook box which is congruent with the reality that the orderbook is literally producing the new candles on the the chart.
Thanks. I've certainly spent some efforts on the client optimization, as some markets produce lots of events per second. BTC-USD and BTC-EUR on GDAX, for example, are often over 100 sustained msg/sec, with higher peaks.
Regarding the orderbook positioning, everyone has their preferences. It's on the plans to make all panels configurable so that they can be moved around, but it's not going to happend on the short term, sorry - many other things on the TODO list!
I must say however that the idea having the orderbook on the left side of the screen is something I would have to get used to. This may sound silly but I like having the orderbook on the right side of the screen since that way new bars on the candlestick chart appear right next to the orderbook box which is congruent with the reality that the orderbook is literally producing the new candles on the the chart.