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# 26 Upgrade notes for 5.0.16

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#### Items

Zabbix agent 2 items **proc.num**, **proc.cpu.utilization**,
**proc.mem** have been updated to use the latest functions introduced in
Go 1.16 and thus provide better performance. [Go](https://go.dev/)
version 1.16 or newer is now required for compiling Zabbix agent 2 to
ensure correct work of these items and avoid an issue observed when
compiling with older Go versions.

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