Many moons ago I filed issue https://www.drupal.org/node/778050 again Drupal. That didn't go anywhere, because the pager was not pluggable and needed to be database-agnostic.
Happily, Backdrop only supports MySQL, so the pager changes should in theory Just Work™. This means that complicated queries no longer need custom count queries and the database doesn't need to run two queries each time a pager is displayed on the site.
I ran a lot of beanchmarks on the original issue and there was no performance degradation for small tables, and improved performance for large tables. You can see details at http://cafuego.net/2010/05/26/fast-paging-real-world
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Thanks! I tested PayPal WPS (since I also use it in my Drupal 7 Commerce shop). With the PayPal server SANDBOX mode (no real payment transaction, just simulated). And everything...
Commerce shop system from Drupal
Peter, I've done an initial port of Commerce PayPal. While I haven't tested it, I think it should work, as the module is not too complex. https://github.com/backdrop-contrib/...
Commerce shop system from Drupal
Glad you finally found it! Someone really needs to port commerce_paypal.
Commerce shop system from Drupal