In this [1] blog post, they say it's "between 2 and 20 times slower than MySQL (but committed to getting down to 4x slower)".

[1]: https://www.dolthub.com/blog/2021-03-09-dolt-use-cases-in-th...

They say it's slower but are trying to close the gap [1]

[1] - https://docs.dolthub.com/sql-reference/benchmarks/latency