Template rendering is rarely a bottleneck. When JS-only pages seem slow, it is often because they are loading large JS libraries or are waiting for after page l

Template rendering is rarely a bottleneck. When JS-only pages seem slow, it is often because they are loading large JS libraries or are waiting for after page load to begin fetching AJAX data. By prerendering the initial JSON data for the page in script tags, and keeping javascript to the minimum necessary to render the page, pure javascript can render very quickly.