# How to improve the redraw speed？

**URL:** https://mapwindow.discourse.group/t/how-to-improve-the-redraw-speed/1037
**Category:** MapWinGIS
**Created:** [June 25, 2021, 2:53am UTC](https://mapwindow.discourse.group/t/how-to-improve-the-redraw-speed/1037 "2021-06-25T02:53:55Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![zcwbnu](https://avatars.discourse-cdn.com/v4/letter/z/3da27b/32.png) [@zcwbnu](https://mapwindow.discourse.group/u/zcwbnu)
#### Post date: [June 25, 2021, 2:53am UTC](https://mapwindow.discourse.group/t/how-to-improve-the-redraw-speed/1037/1 "2021-06-25T02:53:55Z")

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The refresh frequency of the screen is 60Hz, and the refresh frequency of the map is 30Hz, so the operation of the map is relatively slow. I use local SQLite map data, when the map window is small, the redraw time is 0.015s, and when the window is large, the redraw time is 0.046s

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### Author: ![jerryfaust](https://yyz2.discourse-cdn.com/free1/user_avatar/mapwindow.discourse.group/jerryfaust/32/378_2.png) [@jerryfaust](https://mapwindow.discourse.group/u/jerryfaust)
#### Post date: [July 4, 2021, 10:11pm UTC](https://mapwindow.discourse.group/t/how-to-improve-the-redraw-speed/1037/2 "2021-07-04T22:11:04Z")

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Hello @zcwbnu

I’m not sure what makes you say that the map refresh rate is 30Hz. There’s no such ‘clocking’ of the redraw. I would first refer to [this answer](https://mapwindow.discourse.group/t/map-operation-is-very-slow-when-disk-cache-files-are-too-large/1043/2) and see if it helps.

Regards,  
Jerry.

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### Author: ![pmeems](https://yyz2.discourse-cdn.com/free1/user_avatar/mapwindow.discourse.group/pmeems/32/9_2.png) [@pmeems](https://mapwindow.discourse.group/u/pmeems)
#### Post date: [January 31, 2022, 9:56am UTC](https://mapwindow.discourse.group/t/how-to-improve-the-redraw-speed/1037/3 "2022-01-31T09:56:23Z")

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