Hi all,
Just in case anyone needs, here's a tiny python script to warmup prestashop cache.
It fetches all the links from the sitemap page of your site and downloads them.
Usage:
python warmer.py http://example.com/sitemap
where example.com/sitemap is the address of your site's sitemap page.
https://github.com/tonage/presta-cache-warmer/blob/master/warmer.py