You should be pre-rendering them, since a long wait to first byte negatively impacts SEO. Google suggests this https://developers.google.com/webmasters/ajax-cra

You should be pre-rendering them, since a long wait to first byte negatively impacts SEO. Google suggests this https://developers.google.com/webmasters/ajax-crawling/docs/getting-started https://developers.google.com/webmasters/ajax-crawling/docs/.... I recently launched http://crawlspa.com http://crawlspa.com to offer this as a service.