How does it affect page loading speed if you change the size of the image dynamically?

Question

PHP

The site had a lot of pictures that are 300x400 in size. But often I display these pictures in the size of 100x70. Naturally, this is bad for SEO and I decided to make dynamic resizing through the SimpleImage class. That is, the links look like this site.ru/img/100/70/image.jpg instead of site.ru/image.jpg. But now the question arose of how much the server will load and whether there will be more brakes than if I loaded the full picture.

Answer 1

If there is enough disk space, then simply convert the pictures to the desired size in advance.

Answer 2

Example:
route-name - router name
eg images
template-name - processing template small
- 120x90 Pixel
medium - 240x180 Pixel
large - 480x360 Pixel
file-name - file name how much the server will load - it all depends on the number of images on it.