The performance depends on your server capability and how you configured WP Sheet Editor. All the processes in our plugin can be configured to use few server resources or a lot of server resources.
1- Hide all the unnecessary columns
One of the fastest ways to improve loading speed is to hide all those columns that are not necessary, you can find a detailed guide on how to hide unnecessary columns here, and we suggest you blacklist all the columns you will never need.
This process applies to the loading of the spreadsheet, which means, the time it takes for the spreadsheet to load the rows. This doesn’t apply to the speed in which the spreadsheet processes saves changes.
2- How to save changes faster
All the changes are saved in batches and you can configure how many rows are processed per batch. For example, when you import rows, when you bulk edit rows, when you save modified cells, etc. You can find a detailed guide on decreasing processing time here.