November 2019
Beginner
436 pages
8h 52m
English
Content preview from Electron Projects
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Improving query performance
Let's spend some time fixing our application's potential performance problems. According to the warning, we need to add an index for the group field in the /messages list. Let's get started:
- Switch to the Firebase console and click the Rules tab of the Database section.
- Update the rules, as shown in the following screenshot:
- Once you are ready, press the Publish button. At this point, Firebase builds an index and updates the data. You don't need to perform any extra steps at the client-side.
- Reload the page and check out the console's output.
- This time, you should see no performance warnings:
That's all when ...
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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.