Almost one month ago, immediately after the VMware Partner Exchange conference, TechTarget published a scoop about some new features that may appear in the upcoming version of vSphere, expected later this year. The list includes: Transparent Memory Compression This will avoid swap when RAM is overcommited by compressing a set of target pages to a special region . VMware measured the latency of this technique as a hundred times better than the latency of swapping on rotating disks.