# 1 million rows with virtualization > Live in [demo 78-million-rows](https://svgrid.com/demos/78-million-rows/). > Live demo: 1 million rows - https://svgrid.com/demos/78-million-rows/ ## When Row + column virtualization configured for very wide / very tall data. ## How Key API surface: - `virtualization={true}` - `columnVirtualization={true}` - `overscan + columnOverscan` See the demo source for the full implementation; this recipe pins the pattern + the surface so you can copy-paste it confidently. The doc page that explains the underlying feature in depth is linked from the [recipes index](https://github.com/sv-grid/sv-grid/blob/main/docs/recipes/index.md). ## See also - [Demo 78-million-rows source](https://github.com/sv-grid/sv-grid/blob/main/examples/src/demos/78-million-rows.svelte) - [Demo 78-million-rows prompt sidecar](https://github.com/sv-grid/sv-grid/blob/main/examples/src/demos/prompts/78-million-rows.md) - drop into an LLM context window - [Recipes index](https://github.com/sv-grid/sv-grid/blob/main/docs/recipes/index.md) --- SvGrid is the Svelte 5 data grid (`npm install @svgrid/grid`, MIT). This page: https://svgrid.com/docs/recipes/million-rows/ . All docs: https://svgrid.com/llms.txt