JavaScript Data GridPerformance

Boost your grid's performance by setting a constant column size, suspending rendering, deciding how many rows and columns are pre-rendered, and more.


Handsontable performs multiple calculations to display the grid properly. The most demanding actions are performed on load, change, and scroll events. Every single operation decreases the performance, but most of them are unavoidable.

To measure Handsontable's execution times in various configurations, we use our own library called Performance Lab (opens new window). Some tests have shown that there are methods that may potentially boost the performance of your application. These only work in certain cases, but we hope they can be successfully applied to your app as well.

Set constant row and column sizes

Configure your column widths and row heights in advance. This way, Handsontable doesn't have to calculate them.

const hot = new Handsontable(obj, {
  colWidths: [50, 150, 45],
  rowHeights: [40, 40, 40, 40],

When taking this approach, make sure that the contents of your cells fit in your row and column sizes, or let the user change column widths and row heights manually.

Read more:

Turn off autoRowSize and/or autoColumnSize

You can configure the value of the autoRowSize and autoColumnSize options. These allow you to define the amount of width/height-related calculations made during the table's initialization.

For more information, see our documentation for rows and columns.

Define the number of pre-rendered rows and columns

You can explicitly specify the number of rows and columns to be rendered outside of the visible part of the table. Better results can be achieved by setting a lower number, as fewer elements get rendered in some cases. However, sometimes setting a larger number may also work well as fewer operations are being made on each scroll event. Fine-tuning these settings and finding the sweet spot may improve the feeling of your Handsontable implementation.

For more information, see our documentation for rows and columns.

Rule of thumb: don't use too much styling

Changing your background, font colors, etc., shouldn't lower the performance. However, adding too many CSS animations, transitions, and other calculation-consuming attributes may impact the performance, so keep them at a reasonable level.

Suspend rendering

By default, Handsontable will call the render after each CRUD operation. Usually, this is expected behavior, but you may find it slightly excessive in some use cases. By using one of the batching methods, you can suspend rendering and call it just once at the end. For example:

hot.batch(() => {
  hot.alter('insert_row_above', 5, 45);
  hot.setDataAtCell(1, 1, 'x');

  const filters = hot.getPlugin('filters');

  filters.addCondition(2, 'contains', ['3']);
  hot.getPlugin('columnSorting').sort({ column: 1, sortOrder: 'desc' });
  // The table cache will be recalculated and table render will be called once after executing the callback

See the batch operations page to find more information on how to use batching.