# Pinpointing API performance issues with Custom URL Patterns

DevFeed: [Pinpointing API performance issues with Custom URL Patterns](<https://devfeed.tech/articles/pinpointing-api-performance-issues-with-custom-url-patterns-16412.md>)

Original publisher: [Read original article](<https://firebase.blog/posts/2021/10/performance-analysis-with-custom-url-patterns>)

Author: Ibrahim Ulukaya

Published: 2021-10-20T00:00:00Z

Content type: tutorial

Language: en

Sources: [Firebase Blog](<https://devfeed.tech/sources/firebase-blog.md>)

Topics: [Firebase](<https://devfeed.tech/topics/firebase.md>), [API](<https://devfeed.tech/topics/api.md>), [Monitoring](<https://devfeed.tech/topics/monitoring.md>), [dashboards](<https://devfeed.tech/topics/dashboards.md>), [Traces](<https://devfeed.tech/topics/traces.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [app-quality](<https://devfeed.tech/tags/app-quality.md>), [best-practices](<https://devfeed.tech/tags/best-practices.md>), [firebase](<https://devfeed.tech/tags/firebase.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [patterns](<https://devfeed.tech/tags/patterns.md>), [performance](<https://devfeed.tech/tags/performance.md>), [performance-monitoring](<https://devfeed.tech/tags/performance-monitoring.md>), [traces](<https://devfeed.tech/tags/traces.md>), [tutorials](<https://devfeed.tech/tags/tutorials.md>)

## AI overview

This tutorial explains how Firebase Performance Monitoring analyzes network request performance using automatically aggregated and custom URL patterns. It shows how developers can identify slow requests, review response times, success rates, and payload sizes, and investigate performance trends while URL aggregation removes personally identifiable information.

## Source excerpt

News, tutorials, and updates from the Firebase team.