undefined | Better HN

0 pointsrcme2y ago0 comments

HTTP/2 supports request multiplexing so you don’t need multiple connections or queuing to fetch multiple resources.

The bigger issue is that a lot of requests are dependent on previous requests so all the latency adds up. E.g. when you fetch Reddit, it only downloads the JavaScript and then fetches the post content. The move away from server rendering of webpages has really made things slower.

0 comments

cbzoiav2y ago

Multiplexing isn't a golden bullet. You still hit limits.

The initial TCP window is usually around 4KB so you have the handshake SYN RT (+ another two for TLS) followed by at most 4KB of request data. Cookies, auth headers etc. can make that a relatively low number of requests before you need to wait for the next RT. You also have the TCP window on the responses and again headers for large numbers of requests eat into that.

And then as you say dependencies - load the HTML to load the CSS and JS to Auth the user to make the API calls (sometimes with their own dependency chains)...

j / k navigate · click thread line to collapse

0 comments

cbzoiav2y ago

Multiplexing isn't a golden bullet. You still hit limits.

And then as you say dependencies - load the HTML to load the CSS and JS to Auth the user to make the API calls (sometimes with their own dependency chains)...

j / k navigate · click thread line to collapse