Zabbix

.......PS. [ZBX-24103] improved configuration sync, history sync and pollers performance

.......PS. [ZBX-24103] improved configuration sync, history sync and pollers performance

* commit '4cee69a5374d34c7c9594dd19c69173f0a2c7568': (27 commits)
  .......PS. [ZBX-24103] fixed warning
  .......PS. [ZBX-24103] fixed naming
  .......PS. [ZBX-24103] removed redundant NULL checks
  .......PS. [ZBX-24103] removed redundant NULL checks
  .......PS. [ZBX-24103] simplified and improved element insertion by id
  .......PS. [ZBX-24103] simplified and improved element insertion by id
  .......PS. [ZBX-24103] style fixes
  .......PS. [ZBX-24103] added caching of broken down current time to improve performance
  .......PS. [ZBX-24103] reduced padding
  .......PS. [ZBX-24103] fixed key not being released from string pool if item with same key is added
  .......PS. [ZBX-24103] removed redundant memcpy and iterations through each field when syncing not calculated items
  .......PS. [ZBX-24103] removed redundant memcpy and iterations through each field when syncing not calculated items
  .......PS. [ZBX-24103] silenced array bounds warning
  .......PS. [ZBX-24103] fixed string pool usage
  .......PS. [ZBX-24103] removed redundant copying
  .......PS. [ZBX-24103] removed redundant allocations
  .......PS. [ZBX-24103] optimized string pool not to calculate hash several times
  .......PS. [ZBX-24103] code style fix
  .......PS. [ZBX-24103] fixed warning
  .......PS. [ZBX-24103] fixed warning
  ...