Hi Sam, What does this byte array represent? You have to array copies in the entry processor, so I'm not surprised it doesn't perform very well. That's also the reason why it gets worse when size of the array is increased. The fact that you're using off-heap also make it worse in this case as it basically adds another two copies to read from off-heap and then write back.
I would consider revisiting your data model. Is it possible, for example, to create a new entry instead of appending to an existing array? -Val -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/