Where to process data, on the back or front?

Question

PHP

Good day.
The essence of the question is as follows, you need to build a graph with the data received. (start value at the beginning of the hour and end value at the end of the hour), should I fetch certain values ​​from the database, or take all the values ​​and process them at the front?

Answer 1

Draw - then at the front, of course.
And bring the data on the back into a more or less rendered view - filter the desired range, group what you need, etc.