Not the author, but it seems as though Bluebird is indeed faster and more efficient (see [1]). Could also just be habit though.
[1]: https://softwareengineering.stackexchange.com/q/278778/30600...
[1]: https://softwareengineering.stackexchange.com/q/278778/30600...
If you recall from the V8 6.6 release notes, they talked about performance impromevents in promise and async benchmarks.
The Notes: (see Asynchronous performance improvements) https://v8project.blogspot.com/2018/03/v8-release-66.html
The Graph: https://2.bp.blogspot.com/-T_HWK2MlCOY/WrkGw1-ABJI/AAAAAAAAB...
Looks like about 20%, 30% for some benchmarks.
Note to release note authors: Please put IDs on your headers so people can cite you properly. Thank you.
file time(ms) memory(MB)
promises-bluebird-generator.js 282 39.13
promises-native-async-await.js 292 48.66
promises-bluebird.js 305 47.38
promises-then-promise.js 382 67.37
promises-ecmascript6-native.js 390 66.93
file time(ms) memory(MB)
promises-bluebird.js 547 99.01
promises-bluebird-generator.js 574 98.68
promises-native-async-await.js 1165 254.62
promises-ecmascript6-native.js 1231 256.41
promises-then-promise.js 1569 302.88
One thing I noted in looking at the bluebird benchmark is that native promises on Node 10 are only a hair slower than bluebird on Node 8.9. So there's a sales pitch for upgrading to node 10 so you can stop using bluebird.