High Performance Networking

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Vignesh Shanmugam

Deep dive in to the Networks, SPDY & HTTP/2.

Technology

Need Care
Latency Everywhere
TCP Slow Start
3-Way Handshake
SSL Negotiation
Congestion Control
Flow Control
Buffer Bloat
SPOF

How to fix these - Network
CDN
OCSP
HSTS
Tuning TCP slow start/ Tunnelling
TLS False start
Session Resumption/Tickets
Tuning content window size

Fix - FrontEnd
Pipelining/Domain Sharding
Minify/Concat/Obfuscate
Gzip
CSS Sprites
Image Optimisation - Image Optim
Enough - Follow Y-Slow Rules :D

SPDY
Needs TLS
Multiplexing
Resource Priority - Buggy
Header Compression - Only Response
Server Push
Flow Control - Not Much
NPN

HTTP/2
Flow Control - Per Frame
Multiplexing
Server Push
Resource Prioritisation
HPACK - Req & Resp
ALPN
Best Part - Extensions
Operates with/without TLS

Changes
Concat/Minify
CSS/Image Sprites
Domain Sharding
Resource Priorities - Use Heavily
Rest follows

Tools
Webpagetest
Wireshark/Packer-Peeper
Dig/traceroute
DNS-Analyser
Devtools Network Tab
InitCwnd Check
PageSpeed

Questions??
https://twitter.com/_vigneshh

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