PK Gift Shop was hosted on a popular shared hosting provider. Unfortunately, the performance was subpar, with some tests on Pingdom showing over 40 second load time!
By moving to WooCart the store's load time decrease from 22 seconds to 3.8 seconds. There's still space for improvement but without a doubt the move was the right decision.
PK Gift Shop has a pretty complex installation that requires a good amount of server resources. On WooCart it received them and now it runs smoothly.
After further consultation with WooCart, they managed to lower the load time below 3 seconds, as measured with GT Metrix.