Set up Screen Rendering

Detect slow and frozen frames in your app’s screens and debug their root cause.

Minimum Required SDK Version

Screen Rendering is supported starting Luciq SDK version 19.0

Luciq automatically detects any frozen frames or slow frames that your user experiences while using the app. These delayed frames and other critical debugging information is grouped automatically by screen. Learn which screens are experiencing the poorest rendering performance, understand what segments of users are impacted the most, and what spans and operations might’ve caused these issues down to the single occurrence level.

Customizing Screen Grouping

By default, screens are grouped by Activity. However, you can adjust how Frozen and Slow Frames are grouped by configuring Custom UI Traces. These act as their own screen, and any frozen/slow frames that occur when a custom UI trace is active will be aggregated in a new group under that custom UI trace.

• You can run only one custom UI trace at a given time; a trace must be ended before a new one can be started.

• The SDK will end any occurrence that wasn't explicitly ended via the end API.

Start Custom UI Trace

You can use the API below to mark the start of a UI trace. It takes as input a trace name that we use to aggregate the data of relevant occurrences together on your dashboard.

Kotlin

// Start UI Trace
APM.startUITrace("name")

Java

Rules around creating UI Traces:

• Trace name can be up to 150 characters. Any extra characters are truncated.

• Trace name can't be nil or an empty string.

• Avoid adding any of these special characters [, (, ), =, {, }, <, >, /, , ] (commas not included) as they will be replaced with _.

• Starting a new trace has to be done after initializing the SDK.

End Custom UI Trace

Use the API below to end the trace occurrence that you have already started:

Kotlin

// Start UI Trace
APM.startUITrace("name")

Java

Note: Please note that Custom UI Traces do not interfere with Automatic Screen Grouping; both can run in parallel.