Performance issue with big data

Zooming a big data chart gets a big performance issue.
E.g. add a zoom button to your sample view

In my case, I’ve hundreds of tasks, when zooming, the browser is frozen and get “page unresponsive” error.

Any idea to fix it?

Hello Yong,
That sample has an old Gantt version (4.0.0), you can check the following example with the latest version:
I couldn’t reproduce the issue in the latest version (even with 10000 tasks):

Thanks, enabling smart rendering is key for a large data .
And with show_task_cells = true, it will slow down performance by around 5 times.