I am not agree with you. Bluebird have best performance, less memory consumption and great code than Native Promises and this module. I think Bluebird should be instead of Native Promises in JavaScript engines
Can you point out some benchmarks? Would be interesting.
However, if you have performance issues in your app there are probably a lot of things you can optimize, before replacing the promise library. I never worked on an app where the performance of promises became an issue.