Performance issues after adding brush annotation

[tomasjuri]

I am experiencing a significant performance drop that increases with a number of brush annotations added. This eventually results in the annotator freezing or even crashing. It also makes the tool inconvenient to use in real-life annotation scenario.

I am using:

• Google Chrome 70.0.3538.77,
• COCO Annotator v0.8.0 running at https://annotator.justinbrooks.ca/,
• a dataset of 5 images, 2048x2048 resolution

How to replicate the issue:

• Start COCO Annotator at https://annotator.justinbrooks.ca/, register
• create sample dataset (5 images, tag "dog" for example), create annotation class
• pick a brush tool, set its size to 5, start drawing
• the performance drop is noticeable after like 5 seconds of constant brush drawing

[jsbroks]

This issue is a limitation of PaperJS.

A possible solution is to increase the amount of simplification found in the left toolbar under the gear icon. Try to limit the amount of annotation points to only what you need.

Also, make sure to only show annotations you need.

I have created an issue on there repo paperjs/paper.js#1644

[AdanMora]

I have experienced performance issues using Google Chrome, the perfomance is much better with Firefox. Try that.

[jsbroks]

Paper Sketch