Go vs Node.js: When to Use Each

After building production systems in both Go and Node.js, here's my honest take on when to use each.

Performance: Go Wins (Usually)

For CPU-intensive tasks and high-concurrency scenarios, Go's goroutines are unbeatable. I've built real-time sync systems handling 10k+ concurrent connections with minimal resource usage.

Node.js shines for I/O-bound operations, but struggles with CPU-heavy workloads due to the single-threaded event loop.

Developer Experience: It Depends

Go pros:

• Compile-time type safety
• Excellent standard library
• Fast compilation
• Built-in concurrency primitives

Node.js pros:

• Massive npm ecosystem
• Familiar JavaScript syntax
• Rapid prototyping
• Great for full-stack developers

When I Choose Go

• High-performance APIs
• Microservices architecture
• Real-time systems (WebSocket servers)
• CLI tools

When I Choose Node.js

• Rapid MVP development
• Full-stack projects (Next.js + Express)
• Projects with heavy npm dependencies
• Teams already familiar with JavaScript

The Verdict

Both are excellent choices. The "best" option depends on your specific requirements, team expertise, and project constraints.

For Kyuto Fit projects, I often use Go for backend APIs and Next.js for frontend, getting the best of both worlds.