Resizing_Stress_Test

title: Resizing Stress Test with Konva layout: demo_page

This is a stress test demo to select and resize many shapes at the same time.

The demo is using two core Konva features to boost the performance:

1. Layers

Resizing shapes are moved into another layer (another canvas element). So while you resize selected shapes, we don't need to redraw other shapes.

2. Caching

On select, I am moving all selected shapes into a group and cache that group. The cache action will convert group into bitmap image. It is mush faster to redraw such group on the screen.

Instructions: try to select several shapes and resize/rotate them.