5 ms·

Anyone have a good summary of the language feature changes & APIs (either standards or standards track) that are in the version of V8 that ships with Node 7 vs

by emilong 10y ago

Anyone have a good summary of the language feature changes & APIs (either standards or standards track) that are in the version of V8 that ships with Node 7 vs Node 6?

jefozabuss 10y ago
From what I read in slack: Do not use async/await yet (with --harmony-async-await flag) because it has memory leaks (V8 5.5 will fix it when it gets added)
- ilkkao 10y ago
  Is it known how easy it is to trigger the memory leak?
  - PacoLoco 10y ago
    Victor & Marlen
- subie 10y ago
  I came across this just the other day.. https://github.com/MatAtBread/fast-async https://github.com/MatAtBread/fast-async
- TheRealPomax 10y ago
  As a not-elligible-for-LTS version, it's probably fine - you're not going to be using Node 7 in production anyway, as it's only ever a cutting-edge release, unless you don't care about stability in which case memleaks are part and parcel.
jbergstroem 10y ago
Expect a blog post shortly, but from v8 we get these language changes: - await/async behind flag (already covered in thread) - Exponentiation operator: > console.log(60**2*24); 86400 - Object.{values,entries}: > o = { a: 1, b: 2} > Object.values(o); [ 1, 2 ] - Object.getOwnPropertyDescriptor(s): > o = { a: 1 } > Object.getOwnPropertyDescriptors(o); { a: { value: 1, writable: true, enumerable: true, configurable: true } } Additionally, there's a lot of pretty impressive optimization work done by the v8 team. You can read more about that on their blog: http://v8project.blogspot.com http://v8project.blogspot.com Finally, one of my favorite things about Node.js 7.0 is the WhatWG http parser: https://github.com/nodejs/node/pull/7448 https://github.com/nodejs/node/pull/7448. edit: elaborated on exponentiation operator
- Jarwain 10y ago
  60224 == 60^(224) ?
  - swang 10y ago
    exponents are resolved first
- mderazon 10y ago
  Mind explaining what's whatwg URL ?
  - tkxxx7 10y ago
    afaict, this is a parsing library implemented to fulfill WHATWG's spec for URLs. https://url.spec.whatwg.org/ https://url.spec.whatwg.org/
paulirish 10y ago
http://node.green http://node.green tackles this pretty well.
Macha 10y ago
graceful-fs v3.0 is dead. This can bite you if you haven't updated gulp, less, npm, bower or similar in a while

by emilong 10y ago

Anyone have a good summary of the language feature changes & APIs (either standards or standards track) that are in the version of V8 that ships with Node 7 vs Node 6?

jefozabuss 10y ago

From what I read in slack: Do not use async/await yet (with --harmony-async-await flag) because it has memory leaks (V8 5.5 will fix it when it gets added)

ilkkao 10y ago
Is it known how easy it is to trigger the memory leak?
- PacoLoco 10y ago
  Victor & Marlen
subie 10y ago
I came across this just the other day.. https://github.com/MatAtBread/fast-async https://github.com/MatAtBread/fast-async
TheRealPomax 10y ago
As a not-elligible-for-LTS version, it's probably fine - you're not going to be using Node 7 in production anyway, as it's only ever a cutting-edge release, unless you don't care about stability in which case memleaks are part and parcel.

jbergstroem 10y ago

Expect a blog post shortly, but from v8 we get these language changes: - await/async behind flag (already covered in thread) - Exponentiation operator: > console.log(60**2*24); 86400 - Object.{values,entries}: > o = { a: 1, b: 2} > Object.values(o); [ 1, 2 ] - Object.getOwnPropertyDescriptor(s): > o = { a: 1 } > Object.getOwnPropertyDescriptors(o); { a: { value: 1, writable: true, enumerable: true, configurable: true } } Additionally, there's a lot of pretty impressive optimization work done by the v8 team. You can read more about that on their blog: http://v8project.blogspot.com http://v8project.blogspot.com Finally, one of my favorite things about Node.js 7.0 is the WhatWG http parser: https://github.com/nodejs/node/pull/7448 https://github.com/nodejs/node/pull/7448. edit: elaborated on exponentiation operator

Jarwain 10y ago
60224 == 60^(224) ?
- swang 10y ago
  exponents are resolved first
mderazon 10y ago
Mind explaining what's whatwg URL ?
- tkxxx7 10y ago
  afaict, this is a parsing library implemented to fulfill WHATWG's spec for URLs. https://url.spec.whatwg.org/ https://url.spec.whatwg.org/

paulirish 10y ago

http://node.green http://node.green tackles this pretty well.

Macha 10y ago

graceful-fs v3.0 is dead. This can bite you if you haven't updated gulp, less, npm, bower or similar in a while