zkycaesar opened a new issue, #20175: URL: https://github.com/apache/echarts/issues/20175
### Version 5.5.1 ### Link to Minimal Reproduction https://echarts.apache.org/examples/zh/editor.html?code=MYewdgzgLgBADlA-mArgWxgXhgRgAwEEDcAUADYCmsAHgGoCGZKFEWMYFA7jAJJhQBmAEwBBAE5j6ATwAUCZOgCUpSrCkMmLNh24AxMiHpQAbABZxk2fNRplJAPT2YqmOsbMIQ7Vxj7Dg0QlpOSQbOwAzEDEYGRcASzY8IhgEgB54UPRkuIBqHMUYAG8SGFKYOncWAG04gF02ONIymEdXDQ8a-uwAWSMACwA6STAAExA0GTtmt00ITrZeqEGIOLAZBKd8AjsAXxKykhAEOPA2YtLqEWo4iAAuIv3SqCk4CnuAcgA3SveAGn2dv9SlIrjd7ucys9Xh9vpp3gCgTARkZ6BAqODHmU4iMPlBJMAKABaHB_TGlEZxNAUSAnSC3Kpk5pFdj0Kkfah_GBQt4wd6rKDvQEwRnNQostm8qSc7kfcIGIyCxm1RHNCAgFBiAn3KoVWa_NqVCC1BH7NFiOIsDFM8U8954-gE4mk60y3lkVYUZ1MihoOB9VFgh7W5oUiD0ABGlBxXLEzBVZUBjNaYd97rAAHMPmQoFBw17mmmKABlZ6UcEwTjYpb3HAwRPWiB9ECcItSNDhkBke7hRho-PkynUlbgO4M4NlMVgVm2jn6118_iC_Uiic2j5SucvW1y_yK63KxnU0AjHkQ8fvKXr_PB94c9nw631plmi0QAAy0nVUAAQlIPmJmy9PYdiIIA ### Steps to Reproduce I find that if I use random numbers as dataset, like `Math.random()`, the line chart rendering will be very slow. But using dataset with some pattern, like `Math.sin(i)`, it will be much faster. Please have a look at the demo: [demo](https://echarts.apache.org/examples/zh/editor.html?code=MYewdgzgLgBADlA-mArgWxgXhgRgAwEEDcAUADYCmsAHgGoCGZKFEWMYFA7jAJJhQBmAEwBBAE5j6ATwAUCZOgCUpSrCkMmLNh24AxMiHpQAbABZxk2fNRplJAPT2YqmOsbMIQ7Vxj7Dg0QlpOSQbOwAzEDEYGRcASzY8IhgEgB54UPRkuIBqHMUYAG8SGFKYOncWAG04gF02ONIymEdXDQ8a-uwAWSMACwA6STAAExA0GTtmt00ITrZeqEGIOLAZBKd8AjsAXxKykhAEOPA2YtLqEWo4iAAuIv3SqCk4CnuAcgA3SveAGn2dv9SlIrjd7ucys9Xh9vpp3gCgTARkZ6BAqODHmU4iMPlBJMAKABaHB_TGlEZxNAUSAnSC3Kpk5pFdj0Kkfah_GBQt4wd6rKDvQEwRnNQostm8qSc7kfcIGIyCxm1RHNCAgFBiAn3KoVWa_NqVCC1BH7NFiOIsDFM8U8954-gE4mk60y3lkVYUZ1MihoOB9VFgh7W5oUiD0ABGlBxXLEzBVZUBjNaYd97rAAHMPmQoFBw17mmmKABlZ6UcEwTjYpb3HAwRPWiB9ECcItSNDhkBke7hRho-PkynUlbgO4M4NlMVgVm2jn6118_iC_Uiic2j5SucvW1y_yK63KxnU0AjHkQ8fvKXr_PB94c9nw631plmi0QAAy0nVUAAQlIPmJmy9PYdiIIA). Uncomment line 7, and comment line 8. Am I doing something wrong or this is a performance issue? ### Current Behavior Using random numbers as dataset will be much slower. ### Expected Behavior The performance should be the same. ### Environment ```markdown - OS: - Browser: - Framework: ``` ### Any additional comments? _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
