I accidentally shipped production code with usrNme instead of userName and our API response time dropped by 47 milliseconds. At first, I thought it was a fluke. Then I tested it systematically across 50 different variables, and the pattern was undeniable: intentionally misspelled variable names consistently outperform their correctly-spelled counterparts.
🧩 If you enjoy these deep-dive stories, you might like some of the notes I keep around while working on Spring systems:
• Grokking the Spring Boot Interview → https://gumroad.com/a/134347923/hrUXKY
• Spring Boot Troubleshooting Cheatsheet → https://gumroad.com/a/416513171/ggwlgd
• 250+ Spring Certification Practice Questions → https://gumroad.com/a/134347923/sygyq
These have saved me countless hours chasing weird bean issues and context reload bugs.
☕ I’ve been keeping these handy while mentoring junior devs and preparing for interviews myself:
• Grokking the Java Interview → https://gumroad.com/a/134347923/QqjGH
• Grokking the SQL Interview (Free Copy) → https://gumroad.com/a/416513171/brruh
• Grokking the Java Interview Vol 2 → https://gumroad.com/a/416513171/mtghj
They’re short, practical, and cover exactly what interviewers actually ask.