How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →

Your Spark Job Isn't Slow Because of Bad Code. It's Slow Because of the Wrong Join

calendar_today September 3, 2026 person Syed Siraj Mehmood domain dzone

I learned this lesson the hard way. We had a critical data pipeline running for over 3 hours every single day. The logic was perfectly clean.