𝐅𝐫𝐨𝐦 23 𝐒𝐞𝐜𝐨𝐧𝐝𝐬 𝐭𝐨 1.3 𝐌𝐢𝐥𝐥𝐢𝐬𝐞𝐜𝐨𝐧𝐝𝐬: 𝐀 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐃𝐞𝐭𝐞𝐜𝐭𝐢𝐯𝐞 𝐒𝐭𝐨𝐫𝐲(𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠 𝐏𝐫𝐨𝐣𝐞𝐜𝐭)

(Or: How I learned to stop worrying and love the Query Plan) I built a URL Shortener. It was simple. It was elegant. It worked perfectly on my laptop with 50 rows of data. Then, I loaded 100,000 rows of historical data to simulate a real production e...