HTTP/2: How It Works & Its Benefits 🚀

HTTP/2 or H2 for 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.

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Time codes
0:00 Intro
2:15 HTTP 1.1
5:50 HTTP/2
8/25 HTTP/2 With Push
9:48 HTTP/2 Pros
14:10 HTTP/2 Cons
17:15 Demo



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)




+----------+--------+---------+---------+
| Protocol | Online | Fast 3G | Slow 3G |
+----------+--------+---------+---------+
| HTTP 1.1 | 94 ms | 10 s | 36 s |
+----------+--------+---------+---------+
| HTTP/2 | 171 ms | 2.7 s | 10 s |
+----------+--------+---------+---------+

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