New ask Hacker News story: Ask HN: Why are older processors slower at the same frequency?

Ask HN: Why are older processors slower at the same frequency?
4 by etamponi | 6 comments on Hacker News.
I am a software engineer so I am pretty knowledgeable in the topic of computers in general, but this specific question continues to bother me. Why does a processor from 2015 at 2.5GHz run slower than a processor from 2022 at 2.5GHz? What should I look at specifically? Is the difference reported somewhere? In general: how can I tell when I need to replace my processor with a new one (without needing to manually compare the new and old one...)? I think looking at the GHz and number of cores is not enough anymore.

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