Ashutosh Kashyap on Instagram: "Creating threads manually may work for small tasks, but in real applications it leads to ❌ high memory usage ❌ excessive context switching ❌ poor scalability ✅ ExecutorService solves this with thread pooling, task queues, and graceful shutdown. Focus on what to execute, not how or when. #Java #ExecutorService #Multithreading #BackendDevelopment #JavaConcurrency SystemDesign Follow @conceptsofcs to see more content like this."