SKILL: wpf-performance

Purpose

Prevent UI lag, dropped frames, and data-path stalls in real-time waveform + variable dashboards.

Trigger

• •Changes in plot rendering, dispatcher timers, large tables, or high-frequency bindings.

Baseline Commands

• •dotnet build .\\MotorDebugStudio.csproj
• •dotnet-trace --help
• •dotnet-counters --help

Steps

1. •Rendering path review

• •avoid unnecessary full redraws.
• •guard refresh by data version / dirty flags.

1. •DataGrid performance

• •keep virtualization enabled for large parameter sets.
• •avoid expensive converters in high-frequency columns.

1. •Threading model

• •background transport work stays off UI thread.
• •UI collection updates marshaled safely to dispatcher.

1. •Instrumentation

• •use dotnet-counters for runtime trends.
• •use dotnet-trace for hotspots when regressions appear.

1. •Exit criteria

• •no visible freeze during scope run.
• •command latency remains acceptable while plotting.

Deliverables

• •performance note in docs/DEVELOPMENT_LOG.md
• •explicit risk callout if trade-offs remain