UUIDv7: Timestamps aren’t time-ordered and other oddities
First reported · 13h ago · 1 source
Crest summary — written by AI from the 1 source below; every figure is checked against them · model deepseek-flash
Summary
A Hacker News post argues that UUIDv7 lacks the properties developers commonly assume it has.
Key facts
- The post was published on Hacker News on 2026-10-23.
- The title states UUIDv7 does not have the properties people think it does.
Why it matters
Developers who pick UUIDv7 for identifiers based on assumed ordering or uniqueness behavior should check those assumptions before relying on them.
Technologies
- UUIDv7standard
Related on Crest
Matched by rule, not by AI: a repository linked in the coverage, or a technology or company in this event that Crest tracks.
Packages
Original sources (1)
The report this event was built from. Crest of Tech keeps no article bodies: the full text is at each source.
- Hacker NewsCommunity · PrimaryUUIDv7: Timestamps aren’t time-ordered and other oddities · By ibobevRead at Hacker News