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A comment on Ask HN: We just had an actual UUID v4 collision.... Parent comment

Re:Ask HN: We just had an actual UUID v4 collision... by orf on Friday May 08, 2026 @07:14PM (#48069932)
In what world is generating a UUID more expensive than checking for duplicates? at any scale?

Walk me through that please

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Re:Ask HN: We just had an actual UUID v4 collision... by erikerikson on Friday May 08, 2026 @07:18PM (#48069963)
Yeah, that was a little sloppy but it's generating is more expensive than not generating. In more words, generating an id and validating uniqueness is more expensive than only validating uniqueness.
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