Hi Marcin- 

I don’t know of any recent (and reliable) benchmarks. In general, we expect 
1-2% impact on CPU utilization and a minor lag in latency — if not completely 
negligible impact in practical real-world scenarios where consumer code is 
performing tasks. 

SSL adds a bit of CPU overhead, but today’s processors are magnitudes faster 
than the disk I/O and network I/O which tend to be the performance factors for 
messaging and event-driven systems.

Are there specific concerns or features of your use case where SSL performance 
is noticable?

-Matt Pavlovich

> On Aug 1, 2022, at 4:00 AM, Marcin Giedz <marcin.gi...@arise.pl> wrote:
> 
> Hello, are there any metrics /stats to show potential performance downgrade
> when SSL is enabled between broker and client versus non-SSL ?
> 
> Thx
> Marcin

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