Scaling a Monolith to 1M LOC: 113 Pragmatic Lessons from Tech Lead to CTO

The post discusses performance issues related to page counts, long cron-job reads, RAM pressure, and offloading work to background jobs. It also touches on common sources of front-end performance issues, the importance of running EXPLAIN on DB queries, and the benefits of cultivating a culture of openness in discussing performance with team members. Additionally, it emphasizes the need for monitoring layers in software testing and the importance of having multiple team members capable of fixing critical issues.