I constantly use `.map` and `.reduce` out of bluebird. I'm not sure I will replace these soon, since it's out of the Promise A+ specs.
As a matter of fact, does anyone have a benchmark of the new nodejs 8's promise implementation against bluebird, because I so far bluebird was faster than the native implementation.
If I remember correctly there is a 4.5x speed up in the bundled V8 (chrome engine) implementation, making it on-par speed-wise with bluebird, however that is hardly your bottleneck anyway.
The short story is that native promises are faster now except for the "promisification" part.
The benchmark was designed for realistic use in a node environment, where most of the libraries come callback based. Because of that a very fast "promisify" is really important. Native promises don't provide one so the naive implementation using standards-compatible API is quite slow.
Bluebird's promisify is a lot faster since it relies on non-standard (as in non-ES6-standard) internals instead of using the promise constructor as an ES6-based promisifier would need to do.
edit: on second thought, I haven't looked at the included `util.promisify` - it could be taking advantage of non-public internal V8 promise APIs.
As a matter of fact, does anyone have a benchmark of the new nodejs 8's promise implementation against bluebird, because I so far bluebird was faster than the native implementation.