Performance
14 articles on performance in a Svelte 5 data grid: practical guides with copy-paste code, from the team building SvGrid.
- Reactivity with Large Arrays and Objects in Svelte 5 - Deep proxies are powerful but not free. Here is when to pay the cost and when to use $state.raw to keep bulk data loads fast in a SvGrid app.
- Measuring Data Grid Performance in DevTools - A practical profiling workflow for SvGrid - how to read the Performance panel, catch virtualization failures, diagnose layout thrash, and make changes that measurably help.
- Lazy-Loading Master-Detail Content in SvGrid - Fetch detail-panel data only when a row is expanded, cache the results, and cancel abandoned requests - keeping a large grid fast without paying for panels no one views.
- Immutable Grid Updates Without Killing Performance - Surgical immutability - how to get predictable reactivity in SvGrid without the cost of cloning everything on every change.
- First Light - Pointing SvGrid at 100,000 Rows - When we first fed SvGrid a hundred thousand rows, we were testing more than performance - we were testing whether building native on Svelte 5 runes was the right call from the start.
- What Makes a Svelte Data Grid Fast (and How to Measure It) - Performance claims are easy to make. Here is how to actually measure grid speed - what metrics matter, what traps to avoid, and what the fundamentals look like in code.
- Debounce vs Throttle (for Grids and Beyond) - Debounce and throttle are not interchangeable. Here is when each one belongs in your data grid, with real code for filter inputs, live feeds, and scroll.
- Column Virtualization Explained - Row virtualization is well understood, but wide grids expose a second bottleneck. Here is how column virtualization works, when you actually need it, and what trade-offs to expect.
- Avoiding Layout Thrash in Custom Grid Cells - Layout thrash from interleaved DOM reads and writes is the most common cause of scroll jank in grids with custom cells - here is how to find it and design your way out of it.
- Client-Side vs Server-Side Data for Tables - The architectural fork that determines your grid's performance ceiling - how to pick the right data mode and wire it correctly in SvGrid.
- Virtual Scrolling Explained - A practical look at how windowed rendering keeps large grids fast, what makes it break, and how to verify it's actually working.
- Why We Bet on Svelte 5 Runes for a High-Performance Data Grid - Fine-grained reactivity with $state, $derived, and $effect makes surgical cell updates the default, not the exception - and that changes how you build a data grid.
- Render 100,000 Rows Smoothly with Grid Virtualization - A practical look at how SvGrid keeps a Svelte data grid at 60fps with 100k rows - what virtualization actually does, the one layout requirement that breaks it silently, and why $state.raw matters at scale.
- Performance Tips for SvGrid with Svelte 5 Runes - Stable references, batched transactions, and $state.raw - the three techniques that keep a 30,000-row live grid at 60 fps without heroics.