Michael Pradel

Okay, makes sense. Nit: You may want to update the "whatsnew" of https://github.com/pandas-dev/pandas/pull/58376 to let people know that it's more than a performance improvement, but also a fix to this...

Since the change in behavior got introduced with https://github.com/pandas-dev/pandas/pull/56841, looking at the code modified by that PR is probably a good starting point.

Thanks, Ben, for the suggestion. Any ideas for a better name? Would a longer name that includes "WasmBench" help, e.g., "WasmBench-WebAssembly-Benchmark"?

> @michaelpradel What might help discoverability is also adding a repo description. Could you add something like "A large dataset of real-world WebAssembly binaries, collected from the Web, GitHub, NPM...

Looking at the [API documentation of Index.difference](https://pandas.pydata.org/docs/reference/api/pandas.Index.difference.html), I believe case 1 is the desired output. Note that the example I gave above seems wrong, now that I look at it...