Blazor Server's SignalR-based architecture means every UI interaction involves a network round-trip. While this is fast on local networks or within the same datacenter, applications must be optimized for scenarios with higher latency or large datasets.
1. ShouldRender() Overrides
By default, Blazor re-renders a component when any of its parameters change. For components with complex rendering trees, override ShouldRender() to return false when no visual change is needed. This can cut rendering overhead by 50%+ in data-heavy pages.
2. Virtualization
MudBlazor's Virtualize component renders only the visible rows in a list. For grids with 10,000+ rows, this reduces DOM nodes from thousands to dozens, keeping the UI responsive even with massive datasets.
3. EF Core No-Tracking Queries
Read-only queries should use .AsNoTracking() to avoid EF Core's change tracking overhead. This can improve query performance by 30-50% for list views, dashboards, and reports.
4. Server-Side Pagination
Never load entire tables into memory. Implement pagination at the database level using .Skip() and .Take(). MudBlazor's data grid supports server-side pagination out of the box with its ServerData property.
Key Takeaways
- Override ShouldRender() to cut rendering overhead by 50%+
- Use MudBlazor virtualization for large datasets
- Apply AsNoTracking() for all read-only EF Core queries
- Implement server-side pagination — never load full tables