perf(Charts): 10 performance improvements in Chart control#400
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PaulAndersonS wants to merge 1 commit into
Open
perf(Charts): 10 performance improvements in Chart control#400PaulAndersonS wants to merge 1 commit into
PaulAndersonS wants to merge 1 commit into
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1. CategoryAxis: Ensure uniqueness during insertion, eliminating redundant
Distinct().ToList() allocation and extra enumeration.
2. PolarAreaSegment: Replace multiple LINQ .Min()/.Max()/.Where() calls with
a single-pass loop for computing range bounds.
3. StackingAreaSegment: Replace LINQ .Where().Min() and separate .Min()/.Max()
calls with single-pass loop for range computation.
4. ChartTrackballBehavior: Use list swap pattern for PreviousPointInfos to
avoid Clear()+AddRange() copy on every pointer move.
5. ChartTrackballBehavior: Reuse _previousAxisPointInfos list with Clear()
instead of re-allocating on each trackball generation.
6. PolarSeries: Replace LINQ 'from..select..ToList()' with pre-allocated
List and simple for loop to avoid delegate and iterator allocations.
7. CartesianSeries: Replace .Where().ToList() with direct foreach loop in
UpdateSbsSeries() to eliminate intermediate list allocation.
8. CartesianChartArea: Pre-allocate List<double> with known capacity in
stacking calculation loop to avoid internal array resizes.
9. ChartAxis: Replace LINQ .Where() with direct foreach loop and early
return in GetCrossingAxis() to avoid delegate allocation.
10. ChartUtils: Add fast-path type checks in ConvertToDouble() to avoid
ToString() allocation for common numeric types (double, int, float,
long, DateTime). Pre-allocate List capacity in GetMidAngles().
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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Summary
This PR consolidates 10 performance improvements to the Chart control, reducing allocations and eliminating hot-path inefficiencies.
Changes
Distinct().ToList()by ensuring uniqueness during insertion.Min()/.Max()/.Where()with single-pass loop.Where().Min()with single-pass loopfrom..select..ToList()with for loop.Where().ToList()with direct foreach.Where()with direct loop + early returnTesting