[DataGrid] Skip debounce delay on first provider call when using virtualize#4678
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JamesNK wants to merge 1 commit intomicrosoft:mainfrom
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[DataGrid] Skip debounce delay on first provider call when using virtualize#4678JamesNK wants to merge 1 commit intomicrosoft:mainfrom
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Eliminates the unconditional 100ms Task.Delay in ProvideVirtualizedItemsAsync on the first call, improving initial load performance for FluentDataGrid with Virtualize=true and ItemsProvider. Subsequent calls during scrolling still get debounced as before. Fixes microsoft#4676
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vnbaaij
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Hi @JamesNK please re-target this PR to go to the |
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Rolled up into #4680. Thanks again for your contribution! |
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Fix FluentDataGrid initial load performance
Fixes #4676
Problem
ProvideVirtualizedItemsAsyncunconditionally callsawait Task.Delay(100)before every request, including the very first one on page load. This introduces an artificial 100ms delay before grid rows are displayed, even when theItemsProvidercallback is synchronous.Solution
Added a
_isFirstVirtualizeProviderCallboolean field that skips the debounce delay on the first call. Subsequent calls (e.g., during scrolling) continue to be debounced as before.Also fixed a pre-existing IDE0048 build error (missing parentheses for clarity) on the same file.
Changes
FluentDataGrid.razor.cs: SkipTask.Delay(100)on the firstProvideVirtualizedItemsAsynccallFluentDataGrid.razor.cs: Add parentheses toEffectiveLoadingValueexpression to fix IDE0048