cwcfp_fields_per_batch

The cwcfp_fields_per_batch filter requires a numeric output. This controls how many conditional fields are updated at a time when updating from a version lower than 4.0 to 4+.

Default value is 25.

You may need to decrease this number if your site times out while updating the database.

If you are confident that your server can handle more than 25 at a time, you can increase this number.