Objective

Investigate and verify the performance impact of "Virtual Fields" and "Dynamic Column Updates" on horizontal scrolling in the Grid.

Motivation

Post-implementation of "Zero Overhead" records (#9193), there is a subjective perception that horizontal scrolling in DevIndex has become sluggish. We need objective data to confirm if this is a regression caused by the virtual getter overhead, the fix in Column.mjs, or an unrelated factor (e.g., dataset size).

Tasks

1. Create Benchmark Test: Develop a Playwright component test (test/playwright/component/benchmark/GridScroll.spec.mjs) that:
   • Loads a Grid with the DevIndex column structure.
   • Performs an automated horizontal scroll sequence.
   • Measures Frame Rate (FPS) and/or Scripting Duration.
2. Profiling: Use Chrome DevTools Performance Trace (via Playwright) to pinpoint if the bottleneck is:
   • Scripting: RecordFactory getters, Row.createVdom.
   • Rendering: Style/Layout calculations.
3. Analysis: Compare metrics against a baseline (or theoretical expectations).

Outcome

Definitive confirmation of performance status and identification of any bottlenecks to address.