How to Debug a Slow API
Find out why your API went from 200 ms to 3 seconds, step by step
One of the common interview questions is about debugging slow APIs. For example, you might be given a scenario where your API was working fine yesterday, but today users are complaining that the website is slow. How would you find the root cause? Is it the database, a recent deployment, or something else?
In this video, we'll look at how to debug slow APIs step by step. You'll learn why looking at average response times can be misleading, how to use traces and spans to find bottlenecks, and how to narrow down the actual problem.
By the end, you'll have a checklist you can use the next time you're dealing with a slow API or get asked this question in an interview.
