Performance of native ES2015 promises and ES2017 async functions in Node.js v8

Platform info:

• Windows_NT 10.0.15063 x64
• Intel(R) Core(TM) i7-3667U CPU @ 2.00GHz × 4

Async types tested:

• Bluebird Promises = Bluebird 3.5.0 Promises
• Native Promises = ES2015 Chrome V8 Promises
• Async functions = ES2017 Chrome V8 Async Functions

Benchmarks:

• Doxbee sequential
• Madeup parallel

Doxbee sequential

./bench doxbee

Performance of Chrome V8 Promises in current versions of Node.js

Notes: performance of native promises in Node.js v8 improves by a factor of 2 with memory utilization dropping by a factor of 2.3-3.0 in comparison with the previous versions of Node.js.

Performance of Callbacks vs Promises vs Async Functions in Node.js v8

Node.js v8.4.0 (Carbon) / V8 6.0.286.52

Notes: native ES2015 Chrome V8 promises in Node.js v8 perform roughly 2 times slower than Bluebird promises using 50% more memory. In contrast, native ES2017 async functions in Node.js v8 perform only 30% slower than async functions with Bluebird promisify using roughly the same amount of memory.

Madeup parallel

./bench parallel

Performance of Chrome V8 Promises in current versions of Node.js

Notes: performance of native promises in Node.js v8 improves by a factor of 2.3-2.5 with memory utilization dropping by a factor of 2.1-2.6 in comparison with the previous versions of Node.js.

Performance of Callbacks vs Promises vs Async Functions in Node.js v8

Node.js v8.4.0 (Carbon) / V8 6.0.286.52

Notes: both native Chrome V8 ES2015 promises and ES2017 async functions perform roughly 2 times slower than Bluebird promises using almost 2 times more memory.

Conclusion

Node.js v8 comes with significantly improved performance of native ES2015 promises and ES2017 async functions, further boosted by the introduction of native util.promisify.