Client-side A/B apps blank your store while a script picks a variant—shoppers stall and Core Web Vitals drop. ServerSideSplitter never runs that script. The variant is chosen server-side and the visitor is redirected by URL before a pixel paints: zero flicker, zero speed cost, no theme code. Point one URL at the Shopify pages you already built, split traffic across up to 5 weighted variants, and rank winners by real dollars per visitor. Stop hiding flicker. Ship instant split URL tests today.