System information

Geth version: geth v1.5.19
OS & Version: Windows/Linux/OSX
Commit hash : (if develop)

Expected behaviour

snapshot generated with v1.5.16 and v1.5.19 should have similar size

Actual behaviour

two node both synced from: 58104301 to 58588397, which is around 500k blocks, check the storage size

• with v1.5.16
  prune-block block-amount-reserved=475200 & execute DB compact ==> 782GB

• with v1.5.19
  history.blocks=360000 & execute DB compact ==> 787GB
  

Steps to reproduce the behaviour

NA