@acdha @dchud No, new to me! oh! because they started 30 days ago! Now I need to do a 3-way speed comparison.
They were more willing to break backwards compatibility. There is also a rust library that does zero-copy, but that is a very different programming model. A few years ago I tried to use memoryview to see if I could make pymarc zero-copy. Couldn't do it.