How to measure speed (say calls/sec)

[banano]

I’ve been investigating telemetry as it’s seems the right approach, but haven’t found anything about it.
So it’s easy to implement a counter, but how about a performance metric, like processed messages per sec?
It’s not just to +1 on a function call, but maintaining on a time window.

Any guideline appreciated, thanks!

[mindok]

I think there’s a similar thread here:

Telemetry - calculating custom metrics like RPM (requests per minute) on the host itself

So I have been using Telemetry for a while, but on hosts themselves been mostly doing simple metrics that are counters / last_value, and report to statsd via a simple reporter. Nothing fancy, and the actual aggregation mostly happens outside application. I have another project, however, where we want to calculate some of these metrics on host itself. The reason being of havin millions events per minute that we do not really care about in any other way than let’s say “give me number of events pe…