Missing swap file since latest update- Sierra I noticed the swap file went missing after the latest update to Sierra (10.12.5) though swap seems to be working.

vm_stat
Mach Virtual Memory Statistics: (page size of 4096 bytes)
Pages free:                             2152219.
Pages active:                            898204.
Pages inactive:                          276296.
Pages speculative:                       437656.
Pages throttled:                              0.
Pages wired down:                        427700.
Pages purgeable:                         133196.
"Translation faults":                  67396051.
Pages copy-on-write:                    6410771.
Pages zero filled:                     30858807.
Pages reactivated:                           31.
Pages purged:                             42928.
File-backed pages:                       715857.
Anonymous pages:                         896299.
Pages stored in compressor:                   0.
Pages occupied by compressor:                 0.
Decompressions:                               0.
Compressions:                                 0.
Pageins:                                 414848.
Pageouts:                                     0.
Swapins:                                      0.
Swapouts:                                     0.


Has anyone else seen this behavior and can confirm it’s intended and/or harmless?
In previous versions of OS X I always had at least one swapfile. That never went 'away'. Regardless of how much RAM was available.

But since Mavericks the memory management improved steadily (including zram-like vm-compression) and on the latest macOS after a fresh reboot I also do not see a swapfile. It gets then created as needed. 

Only if you have low amounts of RAM in the machine and never see such a file created is there a reason for concern. 

If you open a few apps and then Safari with a few tabs filled you shall see those files again.