We just upgraded @bitfinex and @ethfinex book processes to stream changes 10x faster, bringing the max latency to 35ms. The new processes use 1/3 of the memory and 10% less CPU despite the speed increase. A big win for our users and us. Another 2x should be expected in 2/3 weeks.
This is the format from the doc [ CHANNEL_ID, [ BID, BID_SIZE, ASK, ASK_SIZE, DAILY_CHANGE, DAILY_CHANGE_PERC, LAST_PRICE, VOLUME, HIGH, LOW ] ] So it should match with what you got. Docs right sidebar is not displayin well, we'll fix