short is a major revision of the hyper text transfer protocol that improves the performance of the web. It uses a binary protocol and multiplexing.

In this video I want to go through how HTTP/2 works, its pros and cons and show the performance difference between HTTP 1.1 and HTTP/2

Http/1

request has to wait for a response

And if you used up your connection response you can send anything else.

Source Code: https://github.com/hnasr/javascript_playground/tree/master/staticpage

So hack !

6 tcp connections

Pros

One connection

Multipex

Push ( have to enable)

Hpack (compress)

Cons

Abuse push

Proxies that dont support it might slow down

Load balancer layer 7 (a layer 7 load balancer that doesnt support h2 will slow down when your web server supports it)

Cards

1:25 HTTP crash course

12:30 TLS

Time codes

HTTP 1.1 2:15

HTTP/2 5:50

HTTP/2 With Push 8:25

HTTP/2 Pros 9:48

HTTP/2 Cons 14:10

Demo 17:15

+----------+--------+---------+---------+

| Protocol | Online | Fast 3G | Slow 3G |

+----------+--------+---------+---------+

| HTTP 1.1 | 94 ms | 10 s | 36 s |

+----------+--------+---------+---------+

| HTTP/2  | 171 ms | 2.7 s  | 10 s |

+----------+--------+---------+---------+