Inserting 20,000 rows one statement at a time ran at 775 rows a second; 1,000 rows per statement ran at 156,789, two hundred times faster on the same connection. Prepared statements nearly doubled read throughput. Each extra index cost about 3–4% of insert throughput, and a foreign key about 8%.
Rows inserted per second from one connection, by rows per INSERT statement (log scale). Our measurements, November 2026.
The full report adds insert throughput from 8 to 256 concurrent writers, the cost of 1, 3 and 6 indexes, foreign keys, prepared against unprepared statements, and the floor every query pays for a round trip.
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As of November 9, 2026. Provided as is, for general information, and accurate to the best of our knowledge on the date shown. Not legal, compliance, tax, financial or other professional advice. Prices, limits and vendor services change; check current vendor documentation before relying on anything here. Terms of use.