https://www.professionaldev.dev/tags/hibernate/Recent content in Hibernate on Professional developerHugo -- gohugo.ioenMon, 19 Oct 2026 00:00:00 +0000https://www.professionaldev.dev/post/java/mssqlserver/fast_insert_part5/Mon, 19 Oct 2026 00:00:00 +0000https://www.professionaldev.dev/post/java/mssqlserver/fast_insert_part5/ <p>In <a href="https://www.professionaldev.dev/post/java/mssqlserver/persist_vs_saveall/">Part 1</a> we watched Spring Data's <code>saveAll()</code> take 7x longer than batched <code>persist()</code> because every entity triggers a SELECT before its INSERT. In <a href="https://www.professionaldev.dev/post/java/mssqlserver/fast_insert_part2/">Part 2</a> we switched to raw JDBC and cut the time further. But Hibernate still sits well behind — so how close can it actually get to the bare metal?</p> <p><strong>Three settings close 80% of the gap:</strong> implement <code>Persistable</code> to kill the pre-INSERT SELECTs (8x faster saveAll), use <code>StatelessSession</code> to drop the first-level cache (35% faster persist), and layer <code>useBulkCopyForBatchInsert=true</code> on top (another 2–2.5x). Combined with proper batch sizing, this is as fast as Hibernate gets.</p>