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Is this a thing people care about? From what I've seen of server-side Java applications (we have several at work) 1.6MB and 700 classes are lost in the noise of the endless list of Maven dependencies. I'm sure you can do it a lot more efficiently without using someone else's thing, but what exactly is being optimised for here?

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That was kinda my response as well. If telemetry altogether is using more than 1% of your cpu time you have an architectural problem perhaps.

My experience points to the cost of storing metrics far outweighing the cost of emitting metrics in all but the most extreme of circumstances.

Yes, but in this case the author is an employee of DataDog, presumably working on their agents or clients and so is probably acutely focused on not impacting the performance of their customer's systems.

I thought the author addressed this pretty clearly in the article. For his specific use-case he was delivering a JVM agent.

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