Engineering for Instant Interactions: Meeting Tight INP Budgets in Data-Heavy Angular Apps

Author(s)	Gopi Chand Vegineni
Country	United States
Abstract	Modern Angular apps serve ever-growing datasets and complex UI states while users expect near-instant responses to clicks, taps, and keystrokes. This paper presents a practical playbook for hitting aggressive interaction responsiveness budgets in such environments, with a focus on techniques that directly move real-user Interaction-to-Next-Paint (INP) in the field: input budgets, off-main-thread work, deferrable views, and resource priority hints. We describe a RUM-first evaluation method across pages and components, compare interventions like debounce vs chunked rendering vs Web Workers, and report median and p95 improvements using an ablation study. Results show that combining coarse input budgets, intentional main-thread budgeting, workerized transforms, and lightweight deferral produces consistent wins at the tails, aligning with prior work showing that tail latency drives perceived quality and behaviour.
Field	Engineering
Published In	Volume 15, Issue 3, July-September 2024
Published On	2024-08-09

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International Journal on Science and Technology