How Go Developers Can Fix WebRTC Bottlenecks by Reusing Engine Resources

A common performance pitfall in Go-based WebRTC applications arises when developers create a new webrtc.NewAPI() instance for every incoming SDP offer request, following patterns found in most tutorials. This approach triggers expensive operations per connection, including ECDSA P-256 key generation, hundreds of heap allocations for codecs and interceptors, and fresh UDP socket bindings for ICE candidate gathering. Under concurrent load — around 25 to 30 simultaneous viewers — these repeated costs cause CPU saturation, ICE timeouts, and garbage collector pressure. The root cause is not the Pion library or Go itself, but the failure to reuse costly global infrastructure across connections. The recommended fix is to architect the system so that cryptographic material, codec registrations, and network transports are initialized once and shared across all peer connections.