I would do this client side.

You can perform multiple queries and save all the results in a single array, and generate a csv for thousands and thousands of records this way because limits won't get in the way.

You don't need to involve the server at all. Use downloadify (https://github.com/dcneiner/Downloadify) to initiate a purely client side download.

I would do this client side.

You can perform multiple queries and save all the results in a single array, and generate a csv for thousands and thousands of records this way because limits won't get in the way.

You don't need to involve the server at all, except for fetching the data. Use downloadify (https://github.com/dcneiner/Downloadify) to initiate a purely client side download.