When a checkout feels slow, the instinct is to blame the host or the platform. In our experience, that's rarely the real cause. The usual culprit is a stack of third-party scripts — chat widgets, analytics, upsell apps — each loading synchronously on the one page where every millisecond costs you money.
Open your checkout in Chrome, run a Performance trace, and look at the main thread. If you see long blocking tasks tied to a domain that isn't yours, you've found the problem. The fix is usually to defer, replace, or remove the offending script — not to migrate hosts.
We rebuilt one client's Shopify checkout by isolating two blocking apps. Replacing one and deferring the other cut load time by 1.8 seconds and lifted mobile conversion 14%. No hosting change required.