We guarantee to match the fastest import times on Shopify. Shopify limits every app on the app store to about 2 orders per second. This translates to about 7,200 orders per hour. For an import of around 20,000 orders, expect the system to take around 3-6 hours, depending on the current server load.
Plus store merchants can request to have faster import speeds to speed this up to 2x-4x the normal processing time. Send us an email at support@orderimp.com and we'd be happy to walk you through this process.