It isn’t. The first implementation of promises I worked on was in Java. We used ...

hinkley on July 23, 2022 | parent | context | favorite | on: Ask HN: What are some cool but obscure data struct...

It isn’t. The first implementation of promises I worked on was in Java. We used it as part of verifying certificate chains. If you use threads it doesn’t matter if the operations are blocking, as long as you move them off-thread.