Solved: Why does every email builder still feel so slow?

🚀 Executive Summary TL;DR: Email builders often suffer from sluggish performance due to I/O bottlenecks, not CPU or RAM limitations, as applications spend significant time waiting for disk operations. Solutions involve upgrading disk IOPS for immediate relief, offloading static assets to object storage like S3 for a permanent architectural fix, or implementing in-memory caches like Redis for extreme performance needs. 🎯 Key Takeaways Application slowness, despite healthy CPU and RAM, frequently indicates an I/O bottleneck, where the application is ‘starved’ waiting for disk operations, identifiable with tools like iotop . Offloading static assets (images, templates) to dedicated object storage services like Amazon S3 or Google Cloud Storage is the ‘correct architecture’ for long-term performance, freeing up the server’s local disk I/O for application logic. Implementing an in-memory cache like Redis or Memcached can provide sub-millisecond access for frequently accessed ‘hot data’ but