Further to the previously mentioned size limitation removal, there have been a number of improvements of the In-Memory OLTP engine that may not be immediately apparent, but can still drastically improve performance and scalability.
First up is a range of improvements to the storage subsystem; not only was the checkpoint file pair limit removed, but there was also the introduction of multi-threaded checkpointing. In SQL Server 2014, the offline checkpoint process was a single-threaded system. This thread would scan the transaction log for changes to memory-optimized tables and write those changes to the checkpoint file pairs. This meant that a potentially multi-core system would have a busy core for ...
