My images are not correctly resized in the list pages of magento2, so my pages are heavy and the download is slow....if you are in the same case what to do ?
It may be a malfunction, maybe magento2 can not resize the image because gd is not installed or it does not have the rights on your server in this case here are 2 points to check:
1) Check that the GD library that allows you to resize images is installed on your server
apt-get install php70-gd
2) Check the rights on the folder /pub/media
Another point to check :
3) Configure the right sizes for in your theme (in your theme folder in /etc/view.xml)
<view xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Config/etc/view.xsd">
<image id="category_page_grid" type="small_image">
<image id="category_page_grid-1" type="small_image">
<image id="category_page_list" type="small_image">
This should help you.
You can also use the following command to compress your images:
php <magento install dir > /bin/magento catalog:images:resize
This will compress all the images present for your site, personally I prefer to use the jpegoptim commands if you are under linux try it, it compresses a little better.
I hope it will help you.