LWCIntermediateldswireperformance
Use getRecord with layoutTypes and modes for field-efficient LDS
Real World Scenario
getRecord with default layout pulls 80 Account fields for header LWC displaying only Name and Revenue.
Expected Answer
• optionalFields array listing only required field API names
• layoutTypes Compact vs Full tradeoff for field bundle size
• modes View vs Edit determining available fields
• Smaller wire payload faster paint on mobile
• Add fields to optionalFields when UI expands—not full layout default
• Wire error when optional field lacks FLS for user
• Compare payload size before after field optimization in network tab
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Main difference: use case and scale. optionalFields array listing only required field API names. layoutTypes Compact vs Full tradeoff for field bundle size. Pick based on your integration pattern and team capability. Default layout wire is lazy architecture—explicit optionalFields list is performance and security hygiene. Balance speed of delivery with maintainability.
Architect Perspective
Default layout wire is lazy architecture—explicit optionalFields list is performance and security hygiene.