Tech article
UUIDv7 doesn't have the properties you think it does
Hacker News | Oct 23, 2026 | ibobev
Automated excerpt
Certain RFC compliant implementations of UUIDv7 violate these properties to extreme degrees. Implementations MAY alter the actual timestamp. — RFC 9562 §6.1 This specification makes no requirement or guarantee about how close the clock value needs to be to the actual time. — RFC 9562 §6.1 … implementations MAY increment the timestamp ahead of the actual time … — RFC 9562 §6.2 Incrementing the timestamp ahead of the system clock is an interesting problem. One prominent implementation that increments the timestamp is the Python standard library’s UUIDv7.
Selected automatically from source text; not independently written or fact-checked. Read the original for full context.