**End user of Android based ecommerce app experiences an app slow start.**

**Sentry notifies the development team of the application slow start - File I/O Main Thread Issue**

Click into this issue to open it in Sentry and start troubleshooting

Assign a team member directly from slack to own this issue 

**Sentry will capture span and operations details, due some pattern matching against those details, and identify performance issues in the app. Sentry will automatically detect and classify 15 different types of performance issues. Here is an example common on mobile.**

Event ID:
e313f0ed
Nov 2, 7:39 PM
This Event
1 Child
1 Descendant
View Full Trace: 8aa14f4a (3 events)
Recommended

File IO on Main Thread is a performnce issue Sentry automatically detects.  It's when File IO operations are causing App Hangs or Application Not Responding errors. 

Tag data provides important context to the developer to accelerate root cause analysis

**Senty shows you the offending operations that are related to the performance issue. Use breadcrumbs with the timeline of events leading up to the performance issue.** 

**Let's look at the full event, not just the problems spans identified by Sentry.** 