:lightning:GraphQL's modular structure can result in excessive promises and degradation of performance.
:arrows_clockwise:Node.js's non-blocking IO operations make it efficient for certain tasks, but it can cause sporadic performance issues.
:recycle:Garbage collection and heavy request handlers can impact performance in Node.js applications.
:balance_scale:JavaScript's efficiency depends on the workload. If it's not doing much, it can be fast.
:art:Choosing the right technology stack requires understanding the tradeoffs between performance and development experience.