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Moving trackball quickly block the whole UI in the case of huge amount of data

I'm using syncfusion_flutter_charts (20.3.49) on pub.dev

I render a chart with around 10000 points and trigger the trackball by long press on the chart, when I move the trackball quickly, it cannot display mark smoothly and the whole app is blocked for a while, but it is real-time and very smooth when I render only 5000 points.

Is there any suggestion that I can skip rendering some marks when user press and move the trackball very fast or any approach that can speed up the reaction time?  

Any suggestions would be greatly appreciated

the attachment is my simple code

Attachment: annotation_de60a26c.zip

2 Replies

LP Lokesh Palani Syncfusion Team October 18, 2022 09:04 AM

Hi Henry,

Currently we are validating your query and we will update further details in one business day (19 Oct 2022). We appreciate your patience until then.


Lokesh Palani.

YG Yuvaraj Gajaraj Syncfusion Team October 19, 2022 09:11 AM

Hi Henry,

Thanks for your patience, we can able to reproduce the reported issue at our end while activating the trackball with more than 5000 data points. So, we have considered this as an improvement, and it will be available in any of our upcoming releases. We have logged the feedback for the feature request and shared it below for your reference, you can track the status of the trackball improvement.

Feedback: https://www.syncfusion.com/feedback/38556



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