Shopify Just Tied Every 100ms of LCP to a 3.5% Conversion Drop
Shopify published 28 days of conversion data on April 27, 2026 showing that every 100 milliseconds of slower Largest Contentful Paint costs roughly 3.5% in conversion across actively-selling stores. Stores hitting a 2.5-second LCP convert about 30% lower than stores at 1.5 seconds. Cumulative Layout Shift, the
