July 2018
Intermediate to advanced
354 pages
8h 51m
English
Content preview from Progressive Web Application Development by Example
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Time to first byte
The time it takes to retrieve the first response byte is the time to first byte. This moment starts the response download. The most important network request is for the document. Once downloaded, the rest of the network resources (images, scripts, style sheets, and so on) can be downloaded.
You can break down the time to first byte process into different steps:
- Time to create a connection between the browser and server
- The time it takes to retrieve and possibly render the file on the server
- The time it takes to send the bytes to the browser
The easiest way to measure time to first byte is by opening the browser developer tools by pressing F12 or Ctrl + Shift + I. Each browser's developer tools have a network tab. Here, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.