It's a really neat project. I did some simple benchmarks of it and it was between 10% slower to twice as slow. Which depending on your use case isn't that bad!
https://datastation.multiprocess.io/blog/2022-05-12-sqlite-i...
at segment we benchmarked https://github.com/segmentio/ctlstore against this driver. We saw about a 50% hit to read performance, so we didn't move forward with it, but the improvements in service build times were really appealing.