[clscott]

Sure, maybe it's not as fast to execute as another implementation, but having ANY implementation is far more useful than none at all.

Here's an example where performance wouldn't matter as much:

Let's say I'm the author of a programming language and I want to add a db layer to my standard lib.

Via WASM I can use a working backend while I'm protyping the API for my db layer. If the performance isn't fast enough I can start implementing my own "native" version with feature parity.

I can then use some of the tests from the original library (via WASM) to make sure my implementation has feature parity to the original.