Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
HTTP/2 101
Search
Surma
November 20, 2015
Technology
5
470
HTTP/2 101
Chrome Dev Summit 2015
https://www.youtube.com/watch?v=r5oT_2ndjms
Surma
November 20, 2015
Tweet
Share
More Decks by Surma
See All by Surma
Know thy buzzwords: HTTP/2
surma
1
520
Houdini Breakout Session
surma
4
550
Houdini – Demystifying CSS
surma
3
300
Progressive Web Apps – Mobile has natively come to the Web
surma
5
280
The Glorious Era of HTTP/2
surma
1
77
Instant Loading
surma
4
1.2k
What if there isn’t?
surma
0
69
What if there isn’t?
surma
2
150
The Web is a Contender
surma
0
110
Other Decks in Technology
See All in Technology
Password cracking: past, present, future
openwall
0
270
Real World Type Puzzle and Code Generation
yukukotani
4
640
Laboratories in Science and Technology: Deep Neural Networks
keio_smilab
PRO
3
140
[PyconUS 2024] Having fun with Pydantic and pattern matching
enforcerpl
0
170
RailsConf 2024 Keynote "Startups on Rails in 2024"
irinanazarova
0
800
日本が誇るイタリアのダンスミュージック!? ユーロビートって何??
minorun365
PRO
2
220
From here to resilience - a travel guide
ufried
1
160
OPENLOGI Company Profile
hr01
0
45k
サイボウズ 開発本部採用ピッチ / Cybozu Engineer Recruit
cybozuinsideout
PRO
9
37k
パフォーマンス最適化のベストプラクティス
databricksjapan
0
200
多言語化対応における TypeScript の型定義を通して開発のしやすさについて考えた / TSKaigi TypeScript Multilingualization
nabeliwo
2
390
Oracle Cloud Infrastructureデータベース・クラウド:各バージョンのサポート期間
oracle4engineer
PRO
12
7.9k
Featured
See All Featured
10 Git Anti Patterns You Should be Aware of
lemiorhan
649
58k
Being A Developer After 40
akosma
67
580k
Raft: Consensus for Rubyists
vanstee
133
6.3k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
20
1.8k
In The Pink: A Labor of Love
frogandcode
138
21k
Designing Experiences People Love
moore
136
23k
The Illustrated Children's Guide to Kubernetes
chrisshort
32
47k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
34
6.1k
Fashionably flexible responsive web design (full day workshop)
malarkey
398
65k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
188
16k
It's Worth the Effort
3n
180
27k
Put a Button on it: Removing Barriers to Going Fast.
kastner
58
3.1k
Transcript
None
HTTP2 101 Surma @surmair
TL;DR: SWITCH! HTTP/2 ≥ HTTP/1
TL;DR Performance If you invest, you can squeeze out lots
of Δt
History HTTP HTTP/0.9 HTTP/1.0 HTTP/1.1 SPDY/2 HTTP/2 1991 1995 1997
2012 2015
HTTP/0.9
History HTTP HTTP/0.9 HTTP/1.0 HTTP/1.1 SPDY/2 HTTP/2 1991 1996 1997
2012 2015
HTTP/0.9 GET POST HEAD PUT DELETE LINK UNLINK HTTP/1.0
History HTTP HTTP/0.9 HTTP/1.0 HTTP/1.1 SPDY/2 HTTP/2 1991 1996 1997
2012 2015
None
HTTP/1.x Best Practices Write it, concatenate it, minify it, inline
it, sprite it, shard it, vulcanize it, gzip it Workarounds Hacks
Flaw #1 HOL Blocking aka one-resource-at-a-time syndrome
http2.golang.org/gophertiles
None
h1 h2
Flaw #2 Meta Data GET /index.html User-Agent: Mozilla/5.0… Cookie: session_id=deadbeef
… POST /comment User-Agent: Mozilla/5.0… GET /logo.jpg User-Agent: Mozilla/5.0… GET /script.js User-Agent: Mozilla/5.0… Cookie: session_id=deadbeef …
Flaw #2 Meta Data 200 OK Set-Cookie: … Content-Type: text/html
Content-Encoding: gzip <compressed data> ?
History HTTP HTTP/0.9 HTTP/1.0 HTTP/1.1 SPDY/2 HTTP/2 1991 1996 1997
2012 2015
Welcome to the glorious era of ✨HTTP/2✨ …but what is
it?
HTTP/1.1 Upgrade to h2 ✨HTTP/2✨
✨HTTP/2✨ TLS encrypted
✨HTTP/2✨ Single TCP connection
✨HTTP/2✨
✨HTTP/2✨ Single TCP connection
HTTP/2 Concatenation Inlining Vulcanize Spriting
None
h1 h2
h1 h2
h2 h1
h2 capable h2 enabled h2 unsupported 7,200 ms 5,325 ms
6,160 ms Time to mobile load event Sample is 1 month of data on https://next.ft.com
✨HTTP/2✨
HPACK Header compression specifically for HTTP
✨HPACK✨ Header compression specifically for HTTP glorious
✨HPACK✨ 2 :method GET 3 :method POST 5 :path /index.html
8 :status 200 35 Host 61 www-authenticate 62 … … … GET /index.html Host: www.example.org 2, 5, 35, Huffman(“www.example.org”)
✨HPACK✨ 2 :method GET 3 :method POST 5 :path /index.html
8 :status 200 35 Host 61 www-authenticate 62 Host www.example.org … … … GET /index.html Host: www.example.org 2, 5, 35, Huffman(“www.example.org”)
✨HPACK✨ 2 :method GET 3 :method POST 5 :path /index.html
8 :status 200 35 Host 61 www-authenticate 62 Host www.example.org 63 … … POST /something Host: www.example.org 3, Huffman(“/something”), 62
HPACK Sharding Multiple CDNs
But wait theres more… Squeeze out the last bits of
performance
✨PUSH✨ Can I interest you in some complementary resources to
your resources?
✨PUSH✨ GET /index.html /index.html /style.css /script.js GET /style.css GET /script.js
None
with push without push Don’t push mindlessly!
Still needed GZIP/Deflate First Render CDNs/DNS lookup Cache-Control
47% of HTML 36% of CSS 26% of JS are
still uncompressed without gzip with gzip bit.ly/uncompressed-resources
Now?
Now? (browsers)
Now? (servers) ✔ ✔ ✔
Now? (languages) bit.ly/http2implementations
bit.ly/http2implementations
Now? github.com/GoogleChrome/simplehttp2server (local dev) HTTP/2 & Push
None
None
Now! Your Production Environment
Now! (Tier 1) Put your static assets on a h2
CDN
Now! (Tier 1) 8.41s vs 1.84s over 3G
Now! (Tier 1) 10% less data 0.15% faster
Now! (Tier 2) h2 reverse proxy
Now! (Tier 3) h2
Future? Manifest for static hosters and CDNs manifest.json
{ "index.html": { "/css/app.css": { "type": "style" }, ... },
"page.html": { "/css/page.css": { "type": "style" }, ... } }
$ http2-push-manifest -f index.html -f page.html
WebSockets – Maybe not a Thing Future?
Now? Yes Why? #PerfMatters How? JUST DO IT HTTP/2
Thank you! Surma @surmair