{"type": "rich", "version": "1.0", "title": "Issue #21\u2014The ethics of web performance, HTTP/3, faster promises and async functions, Google Lighthouse 4.0 and more!", "author_name": "Perf.email by Calibre", "author_url": "https://buttondown.com/perfemail", "provider_name": "Buttondown", "provider_url": "https://buttondown.com", "html": "<iframe scrolling=\"no\" style=\"width:100%!important;height:300px;position:relative;\" src=\"https://buttondown.com/perfemail?as_embed=true\"></iframe>", "width": 600, "height": 300}