Performance Optimization

SciGrid is designed to handle millions of rows. However, your implementation of IDataGridProvider can impact performance.

1. Fast getCellData

The getCellData is called thousands of times during scroll events.

• Avoid calculations: Compute expensive values ahead of time or memoize them.
• Avoid string formatting: If possible, keep data raw and format it only when necessary.
• No API calls: Never make network requests inside getCellData.

2. Virtual High-Performance Scrolling

SciGrid uses binary search to find visible columns, making horizontal scrolling instant even with 100,000 columns. Vertical scrolling is inherently O(1) due to fixed row heights or block-based calculation.

3. Passive Event Listeners

We use passive scroll listeners to decouple rendering from scrolling on the main thread where possible, ensuring smooth 60fps scrolling.

4. Avoiding React/Vue Overhead

While we provide wrappers, passing massive objects via props can be slow. SciGridReact and SciGridVue use shallowRef or direct refs to avoid Proxy overhead on the data provider itself.

Bad Pattern

// This re-creates the provider on every render!
<SciGridReact provider={{ getRowCount: ... }} />

Good Pattern

const provider = useMemo(() => new MyBigDataProvider(), []);
<SciGridReact provider={provider} />