# smart_scales

### Description

@short: Specifies that only visible part of the time scale is rendered on the screen

@signature: smart_scales: boolean

### Example

~~~jsx
gantt.config.smart_scales = true;
~~~

**Default value:** true

### Details

added in version 4.1

Usage of this config significantly speeds up chart rendering if you have a very long time scale.

### Related Guides
- [Performance: Ways to Improve](guides/performance.md#common-techniques)