Migrating CI3 to CI4, need query->numRows function

Is it not enough for you?

I can only answer for myself. My take away is that getResult() loops the result set and reads in all the records. In CI3, num_rows() (at least for MySQL) queried mysqli_result::$num_rows and returned that without setting up the resulting records.

It doesn't just loop through the results, it instantiates an object for every single record. This is consuming a lot of memory and CPU cycles just to get some idea of how many records the query returned.