That err == nil check was added very recently and isn’t included in the latest G... | Hacker News

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		jamespwilliams on June 1, 2024 \| parent \| context \| favorite \| on: Go: Sentinel errors and errors.Is() slow your code... That err == nil check was added very recently and isn’t included in the latest Go release, which the author used in this article.

esprehn on June 1, 2024 [–]

Ah ha! So the issue was always going through the error type reflection even for the success path.

https://github.com/golang/go/commit/af43932c20d5b59cdffca454...

I'd be interesting to see the benchmark after that.

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