Your slow query,
rewritten and timed.
Paste in a query that is taking too long. QueryBolt rewrites it, runs the old and new versions side by side in a throwaway database, and tells you how much time the rewrite actually saved. Your production database is never touched.
rows scanned
median across 260 qualifying optimizations, benchmarked on live MySQL 8 and SQL Server 2022. The best of them ran about 100 times faster. How we measure this →
How it works
Send us the SQL
Paste it in or upload a .sql file. SELECT statements and stored procedures, on MySQL 8 or SQL Server.
Tell us about the tables
Table definitions and rough row counts are enough. Without them the benchmark runs on data too small to prove anything.
We run both versions
Old and new go into a temporary database built for this one job. It is deleted when the job finishes, and your own database is never connected to.
Read it before you ship it
The diff, the timings, the execution plan and any index we would add. Export the lot as Markdown if you want it in the PR.
Side-by-side SQL review
Every line we changed, and nothing hidden.
Real benchmark data
Execution time and rows examined, with a check that both versions return the same rows.
Execution plan visual
The plan that explains where the time went.
Index recommendations
The ALTER TABLE we would run, and what we think it buys you.
Markdown export
Paste the whole report into a PR.
No production access
A fresh database per run, deleted afterwards.
Try it on your worst query.
If the rewrite does not beat the improvement threshold, your monthly count stays where it was.
Start free