How HTTP/2 Works, Performance, Pros & Cons and More

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.

HTTP/2 (Slides)
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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.



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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Hussein

[whereismypipey]

I loved the picture grid loading example to nicely visualize the performance and difference in number of connections.

[umeshshetty]

I am a Network Engineer but I love the backend Engineering stuff that you show and it makes it easier for me to understand application problems while troubleshooting the network side of it. Thank You and Keep posting !!!

[balramverma]

This channel is to addictive that even in the period I’m focusing on front end stuff i end up watching these.

[fraollemecha]

HTTP/2: We gotta do it fast.
Michael Scott: That's what she said.

[dean]

thank you Hussein! I want you to understand that this is great content and I love the way you deliver it with such energy and excitement. I frequently download videos from YouTube for offline use and I just downloaded this one because I think it's great content.

[omriterem]

One of the best YouTube channels for programmers...

[danielkrajnik]

the more I learn about software, the more I find that every next upgrade boils down to parallelization

[mohamad]

Your content is great! Thanks Hussein!

[subhamthemusicalguy]

Joined your channel to support you. Excellent work

[이유창-wz]

excellent!! very clear provocation and easy to understand.

[natarajboina]

This was very insightful. Thanks for this video.

[andikakurniawan]

I like this guy. This guy is smart and also have talent to be teacher...

[amsterdenko]

First time on your channel. Subscribed after this first video. I like your style of content delivery. Such a themes become much more entertantaining. Thank You!

[oah]

More reasons to love. L4 LBs. Thx Hussein.

[hozay]

So many advances for the internet that I was not aware of!

[Ranjith_P]

Its a huge performance difference - thats what she said

[longtranbao]

Thanks you! In school people don't teach about this stuff.

[zitro]

Im in education as IT-Specialist - System Integration right now, third year and almost finished my Project. My Teachers couldnt teach us normal OSI model or SQL, we never had HTML in school. imagine you doin this just in your free time and you are more meaningfull as much Teachers in germanys working schools for myself and some friends. Thanks for that little snack, i just wanna set up an HTTP 2 server now :D! should i go for nginx or more for something like apache?

[amrudeshs]

Hei. Great info. Thnx. Can you also make a comparison between HTTP2 server push and Websockets based push messages? I understand that they dont serve the same purposes but a short video on it explaining when to use what would be great.

[sreevishal]

michael scott..!, that's what she said.. haha :p :p
Nice explanation..!