Node.js Core State of the Union- James Snell

Node.js Core
State of the Union
James M Snell, IBM
@jasnell

Community.
Gemeenschap. Communauté. Comunidad.
When I first got involved with Node.js Core, there were 14 active participants
(not counting everyone involved in io.js)
Up to that point, Node.js had 681 contributors over it's lifetime.

Gemeenschap. Communauté. Comunidad
Just over a year and a half later, there are 85 contributors with commit
access to the main repository (with more added regularly)
The contributors list now tops 1084 individuals.
Community.

476 people in the Node.js GitHub organization
103 GitHub repositories
92 GitHub teams
4109 forks of the node.js/node repository
Community.

Stability.
Stabilität. Stabiliteit. Cobhsaíochta.
There have been 2.7k+ commits on master since v4.0.0
49% focus on improving documentation, tests and benchmarks.
15% focus on updated tooling, build and dependencies.
17 semver-major commits in v5
90 semver-major commits in v6

Stability.
As soon as we made it easier for the community to
contribute to Node.js,
That community immediately began working to make
Node.js more secure, stable, and performant.

Stability.
http://benchmarking.nodejs.org

Stability.
Canary in the Goldmine

With citgm, we are now proac6vely
running tests for 68 of the most depended
on modules in the Node.js ecosystem –
catching regressions before they happen.
h@ps://github.com/nodejs/citgm

Stability.
Canary in the Goldmine

Running all semver-major changes through
both CI and citgm before they land is now
standard prac6ce.

(shout out to @TheAlphaNerd for making this happen…
and go see his talk!)
h@ps://github.com/nodejs/citgm

Stability.
Every non-trivial commit tested on…
•  FreeBSD
•  ARM v7 – Ubuntu
•  ARM v7 – Wheezy
•  ARM v8 – Ubuntu 14.04
•  ARM v8 – Ubuntu 16.04
(arm64)
•  LinuxOne
•  CentOS 5 (32 / 64)
•  CentOS 6 (64)
•  CentOS 7 (64)
•  Debian 8 (64, x86)
•  Fedora 22
•  Fedora 23
•  Fedora 24
•  Ubuntu 12.04 (64)
•  Ubuntu 14.04 (32 / 64 / PPC BE &
LE)
•  Ubuntu 16.04 (32 / 64 / Docker
Alpine)
•  MacOS
•  Linux-FIPS (Ubuntu)
•  AIX
•  SmartOS 14 (32 / 64)
•  Raspbian Wheezy (pi 1, pi 2, pi 3)
•  Windows 10 (VS 2015)
•  Windows 2008 r2 (VS 2015)
•  Windows 2012 r2 (VS 2015)

Releases.
Publiceren. Veröffentlichen. Publier.
v0.10.0
io.js
v1.0.0
v0.12.0
io.js
v2.0.0
io.js
v3.0.0
v4.0.0 v5.0.0 v6.0.0
2013 2014 2015 2016
There have been 120 Node.js releases* since January 2015
31 releases to v4, v0.10 and v0.12 under the LTS Plan
*including all of the io.js releases

Releases.
New major release every 6 months
Even Numbered Releases in April
Odd Numbered Releases in October
Even Numbered Releases go under LTS Plan in October
LTS Plan === 30 months of guaranteed support.

Releases.
Current
Node.js v6.5.0
LTS
Node.js v4.5.0
Maintenance
Node.js v0.12.13
Node.js v0.10.44

Releases.
Current
Node.js v6.5.0
LTS
Node.js v4.5.0
Maintenance
Node.js v0.12.13
Node.js v0.10.44
2016-12-31
2016-10-31
2018-04
Time to
Upgrade
LTS Expiration:

Releases.
Node.js v6.x "Boron" LTS
October 2016
Will be supported until April 2019

Releases.
Node.js v7.0.0 Current
October 2016
Will be supported until ~June 2017
First Beta build next week

Releases.
Node.js v8.0.0
April 2017
Will be supported until April 2020

Where we're going
Waar we naartoe gaan Où nous allons
Better Web Standards Support
Improved ES6/7 Support
Improved Node.js Internals
Improved Runtime & Post Mortem Debugging
New Installer
Continued focus on Community

Web standards.
Webstandaarden. Les standards du Web.
WHATWG URL Parsing

const url = new URL('http://nodejs.org');

https://github.com/nodejs/node/pull/7448

Web standards.
Improved HTTP 1.1 Spec Compliance
Better Input Validation
Enhanced Security

Web standards.
HTTP/2 ?
https://github.com/nodejs/node-eps/pull/38

Language standards.
Normes Langage de programmation.
Continued improvements to ES6/7 Support
Promises
async await
ES6 Modules
Node.js v7 should ship with V8 5.4

Language standards.
async await is coming.
(we just don't know when)
We have some work to do on Promises still.
(Namely, making Promises compatible with
Node.js Debugging and making the Node.js
API compatible with Promises)

Language standards.
ES6 Modules are a difficult, non-trivial problem.
Significant effort is going into getting it right.
It will happen, but may take some time.
(and a big shout out to @bradleymeck for leading the way)

Language standards.
The Node.js Core Team is exploring how to better
engage with TC-39 to ensure that new JavaScript
language features meet the needs of Node.js users.

Internals.
Wewnętrzne. Sisäosat. Interno.
Async-Hook
Multiple-Isolates (Workers)
New Native Module API/ABI
Static Error Codes
uv_link_t Streams
Multiple VMs
Improved Embedding
Improved i18n

Internals.
Async-Hook
Provides the ability to attach listeners to the event-loop lifecycle.
Allows peeking behind the curtain.

Internals.
Multiple-isolates (Workers)
Worker-based multi-threading within a
single Node.js process.

Internals.
A new API/ABI for native module developers
that abstracts the VM layer.
No more binding directly to V8 APIs.
https://github.com/nodejs/abi-stable-node

Internals.
#include <node_jsvmapi.h>
void Method(napi_env env, napi_func_cb_info info) {
napi_set_return_value(
env,
info,
napi_create_string(env, "world"));
}
void Init(napi_env env, napi_value exports, napi_value module) {
napi_set_property(env, exports,
napi_property_name(env, "hello"),
napi_create_function(env, Method));
}
NODE_MODULE_ABI(addon, Init)

Internals.
Static Error Codes
Every error generated by Node.js will have a stable, static error code
allowing greater consistency in errors.
No more parsing error messages.

Internals.
uv_link_t Streams
Flexible, powerful chained streams API for
native modules built directly on libuv.

Internals.
Multiple VMs
Starting with Node.js on Chakra, work is underway to enable Node.js
core to be fully VM agnostic in the future.
https://github.com/nodejs/node-chakracore

Internals.
Improved Embedding
Working with members of the Electron and IoT communities,
work is underway to make it easier to embed Node.js
in other environments.

Internals.
Improved Internationalization
Work is underway to improve Internationalization in Core by
making it easier to discover i18n data sets, transcode Buffers
from one character encoding to another, query Unicode character
properties, and more.

Debugging.
Risoluzione dei problemi. Fehlerbehebung.
Common Heap Dump Format
Improved Core Dump Analysis Tooling
node-report – Human-readable diagnostic
summary
JavaScript API for Node.js Core Dump Analysis

Debugging.
h@ps://github.com/nodejs/post-mortem/issues/13
h@p://github/nodejs/nodereport
h@ps://github.com/nodejs/post-mortem/issues/33

Debugging.
Node.js now includes experimental support for
the Chrome Inspector.
$ node --inspect

Installation
Shuiteáil. Instalacja. Монтаж.
Work is underway to build a new Electron-based
Installer for Node.js

h@ps://github.com/nodejs/installer

Come help us. There's lots to do still.
500+ Open Issues in the Core repo:
100+ Feature Requests
100+ Documentation Issues
60+ Windows Related Issues
58+ HTTP Related Issues
30+ Confirmed Bugs
20+ Issues marked "Good First Contribution"
Community.

The Node.js Technical Steering Committee has asked the
Node.js Foundation to explore new opportunities for
expanding and diversifying the community of Node.js core
contributors.
Community.
Tracy Hinds
@hackygolucky
Mikeal Rogers
@mikeal

Grazie. Dank je wel. Danke.
On behalf of all Node.js Core Contributors,
Thank you.
Thank you.

Node.js Core State of the Union- James Snell

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