热力图现在支持分片加载吗？就是appendData发现没有效果
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bug
enhancement
pending
performance
- Dominant language
- TypeScript
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Description
### Version
4.7.0
### Steps to reproduce
数据量在300万左右页面会崩溃
### What is expected?
期望能分片加载
### What is actually happening?
大数量echar也能很好的支持
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