Evgeniy Polyakov wrote:

Hi Daniele.

This actually may be not a big problem, since we allocate and free
objects all the time, but still it is additional overhead which can be
avoided. Did you run some perfromance analysis to check if influence is
small or not visible at all?
  

Evgeniy, thanks for pointing out the issue.

On my virtual machine (kvm), the alloc operation always takes less than 
one jiffie, but I can't say exactly how long. Is there a way to measure 
fast path time more accurately (e.g. nanoseconds)?