Hi Diego,

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

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The loading speed depends on a lot of factors - your hosting plan, server's performance, amount of other data on the page, internet speed, etc. 

For example, you can take a look at the table on our documentation, which contains around 2.600.000 rows, and see how it loads. The more data the table has, the more chance that it will impact the loading time.

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You can also check, in this table's filter settings for columns, how many unique filtering values there are.

If you have, for example - a string column that you set as a selectbox/multiselectbox, 

and if it has more than 50 possible filtering values,

you can go into that column setting, and check what is set for "Number of possible values to load" – 

Here you can define how many possible values per page will be loaded in selectbox filter and editor inputs. It is recommended not to be set for All if you have more than 50 possible values for this column.

So, check if that might be the case, try to lower the value to 50 and see if it helps the speed.

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Also, it is possible for other plugins to affect the loading speed.

We had a couple of cases with users who have an "optimization plugin" with specific settings, 

such as  'SiteGround Optimizer', for example.

These plugins have certain settings that can negatively affect the performance of our tables.

If there is any JS minification going on,  there can be other settings, I can't say exactly,

but something to be aware of.

If you wish to do troubleshoot testing to check if an optimization/caching plugin might be slowing down tables,

you can try to disable all plugins and just leave wpDataTables - then clear all cache and reload the page, see if it loads faster.

Then, if any optimization plugin Is used, try to revert all its settings to default, and if you use server-side tables ( such as SQL or Manual tables) ,  then exclude the pages where you have tables from caching.

That is about all the advice i can give about this,

but of course, let us know if this helps, and if you have additional questions. 

Thank you.