How Much Does it Cost to Scale an App to 100,000 Users?
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So I built a Twitter clone and decided to see what happens when you throw an absolutely ridiculous amount of users at it. Started with 100 users, seemed fine. Then 1,000 users... things got interesting. By 10,000 users I was having to completely rethink my architecture.
Built the whole thing with FastAPI, Postgres, and Docker containers, then used Locust to simulate users absolutely hammering the system. Spoiler alert: vertical scaling only gets you so far before you ha…
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Chapters (12)
Hook: Testing 100 to 100,000 Users
0:15
Why Load Balancing Matters
1:10
Building the Twitter Clone
1:56
Setting Up Locust Load Testing
2:38
Testing Locally First
2:51
Deploying with Sevalla (Sponsor)
3:51
Deploy #1: The Baseline
4:37
100 Users: $15/Month
5:34
1,000 Users: When Things Get Slow
7:58
10,000 Users: Distributed Load Testing
9:27
100,000 Users: Horizontal Scaling
12:24
Lessons Learned
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