UUID v4 vs UUID v7 — Lequel choisir pour PostgreSQL en 2026 ?
The article discusses the choice between UUID v4 and UUID v7 for PostgreSQL in 2026. UUID v4 has been the default for unique identifiers but presents performance issues due to index fragmentation. In contrast, UUID v7, which incorporates a timestamp, offers better performance and less fragmentation, making it a compelling alternative.
- ▪UUID v4 is based on random 122 bits, leading to index fragmentation in PostgreSQL.
- ▪UUID v7 integrates a timestamp, resulting in sequential writes and improved insertion speeds.
- ▪The article provides benchmarks showing that UUID v7 is significantly faster than UUID v4 for large datasets.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3927615) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Kouadio mathias Kouame Posted on May 30 UUID v4 vs UUID v7 — Lequel choisir pour PostgreSQL en 2026 ? #postgres #database #performance #backend Si vous utilisez PostgreSQL, vous avez probablement déjà dû choisir entre une clé primaire BIGSERIAL et un UUID. Depuis des années, la version 4 (aléatoire) est le choix par défaut quand on veut un identifiant unique et distribué.
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