performance-trace-list-performan-loading-the-traces-list-for-a-project-becomes-incr-a2b42b0e

THEN Implement UI lazy loading of spans to avoid loading all spans at once. This reduces the initial payload and improves page load time. The approach was successfully used in a similar issue (Phoenix #3917) to address performance degradation.

// Paraphrased: In the trace list component, only fetch and render the first N spans per trace, then load additional spans on demand (e.g., via intersection observer or a 'load more' button). Replace the full span loading call with a paginated API that returns spans in chunks.