This crate provided a thread pool for executing short, I/O-heavy futures efficiently.

It is no longer necessary following the scheduler improvements in tokio 0.2.0-alpha.7, which handle concurrent I/O on many sockets much better than the old scheduler did. Tokio 0.2 also does not allow the same hooks to provide a custom scheduler, so even if it were necessary, updating tokio-io-pool to work as "transparently" as it did with tokio 0.1 would be difficult. For that reason, this project has been discontinued. If you find an issue with tokio's performance, file it as a tokio bug :)