Making Connections:
TCP, HTTP/2 And You
Why should you care?
- If you browse the web
-
If you're a developer:
- On the cutting edge
- Middle of the pack
- Late adopters
Overview
-
Latency vs. Bandwidth
-
Basics of a request
-
TCP
-
SSL/TLS
-
HTTP
-
.9, 1.0, 1.1
- 2.0
-
Latency vs. Bandwidth
Speed of Light = c
c = 299,792,458 meters per second
99.7%
125 milliseconds
Anatomy of a Request
Round Trip Counter: 0
DNS
Round Trip Counter: 1
TCP
Round Trip Counter: 2
TCP
TCP TLS
TLS
Round Trip Counter: 4
HTTP
TCP TLS HTTP Data You Wanted
Round Trip Counter: 5
TCP
TCP
SYN
TCP
SYN
ACK
TCP
Congestion
TCP
Congestion
10x
TCP
Congestion
10x
10x
10x
10x
TCP
Congestion
10x
10x
10x
10x
TCP
Congestion Flow
10x 4x
10x 4x
10x 4x
10x 4x
TCP
Window Scaling
20 at a time
TLS
- Encryption
- Authentication
- Integrity
HTTP
.9
HTTP
1.0
HTTP
1.0
Content-Type
ASCII
你好
HTTP
1.0
HTTP
1.0
HTTP
1.1
Optimizations
SPDY
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
February 2015
Make It Faster
-
If Using HTTP 2
-
Don’t concat JS/CSS
-
Don’t sprite images
-
Don’t split hosts
-
-
If Using HTTP 1.1
-
Concat JS/CSS
-
Minify JS and CSS
-
gzip JS and CSS
-
Sprite images
-
Split Your Hosts
-
Ensure Keep-Alive is enabled (default for 1.1, but good to be sure)
-
Keep Headers to a minimum - transmitted always
-
Always
-
Transfer Less Data
-
Use up-to-date kernels to ensure best TCP performance
-
Make sure your TCP and SSL is properly configured
- Properly set up caching of assets
HTTP/2
https://http2rulez.com
People think computers will keep them from making mistakes. They're wrong. With computers you make mistakes faster.
~Adam Osborne
Thanks!
The Noun Project
Annette Vee - Talk Name Generator
Making Connections:HTTP/2 And You
By il1019
