Nobody likes a slow website. So I developed a Shopify theme with high performance. That is the Shopcast Shopify theme.
It loads very fast. These are performance testing results on Google Pagespeed Insights https://developers.google.com/speed/pagespeed/insights/?hl=en&url=https%3A%2F%2Fbt-shopcast-1.myshop... , GTMetrix https://gtmetrix.com/reports/bt-shopcast-1.myshopify.com/nO51Kl0J , and Pingdom https://tools.pingdom.com/#5b98d188f5000000 .
In addition, you will save lots of costs for Shopify apps because this theme has the features like Shopify apps such as frequently products bought together, add different size chart and custom tabs and countdown timer for each product, free shipping notification, collection tree in collection filter block on the collection page, infinite scrolling products and tons of strong features. Hope you will like this theme!