March 2026 performance summary for apache/airflow: Delivered a streaming endpoint for task-instance summaries (Streaming Task-Instance Summary Endpoint) that streams multiple DAG run task-instance summaries over a single NDJSON connection, eliminating N+1 requests and delivering a substantial performance boost for dashboards and automation. This feature was complemented by a refactor of the GridTISummaries schema to improve clarity and streaming efficiency. Key commits included 7c77a6d2480cb27eea5d29724bbbfdcf2fbd140b which implemented the NDJSON streaming, fixed formatting and lint issues, and improved documentation consistency (capitalization of Dag). No major user-facing bugs were reported this month; the team focused on code quality and stability through static checks. Overall impact: reduced API call overhead, faster data retrieval for task-instance summaries, and enhanced developer experience through clearer schemas and better documentation. Technologies/skills demonstrated: NDJSON streaming, API streaming patterns, schema refactoring, lint/static check remediation, documentation standards.