How much memory does each WebSocket connection use?

Node.js: ~20KB per connection. Go/Rust: ~4-8KB. Java/Spring: ~40-80KB. A server with 4GB heap can handle ~200K WebSocket connections in Node.js vs ~1M in Go.

How many concurrent WebSocket connections can a server handle?

A 4 vCPU/8GB server: ~200K in Node.js, ~500K in Go with horizontal scaling at 80% memory. Plan for 10Gbps NIC for >100K connections.

Should I use WebSockets or Server-Sent Events (SSE)?

Use WebSockets for bidirectional real-time (chat, gaming). Use SSE for server-to-client push (notifications) - simpler and 2-3x more memory efficient using HTTP/2 multiplexing.

WebSocket Connection Memory Overhead Calculator

Calculate server memory required for WebSocket connections. Each persistent WebSocket connection uses 20-50KB of server memory. Model capacity for real-time applications.

AI & SaaS Tools

SaaS Metrics

AI Compute

AI ROI

LTV:CAC Ratio

ARPU ($/month)

Monthly Churn %

CAC ($)

Gross Margin %

LTV

$3500

LTV:CAC

11.67

Payback

2.9 mo

Health

Healthy ✓

Benchmark: LTV:CAC ≥ 3 is healthy. Payback under 12 months is excellent. Under 1 means you lose money on each customer.

How to Use

Enter the values for the scenario you are assessing. Calculate server memory required for WebSocket connections. Each persistent WebSocket connection uses 20-50KB of server memory. Model capacity for real-time applications. Use the websocket memory result to inform your calculation.

Related Calculators

API Latency Percentiles

AI & Tech

Load Test Ramp Rate

AI & Tech

Microservices Latency

AI & Tech

WebSocket Connection Memory Overhead Calculator

LTV:CAC Ratio

How to Use

Related Calculators

Frequently Asked Questions

How much memory does each WebSocket connection use?

How many concurrent WebSocket connections can a server handle?

Should I use WebSockets or Server-Sent Events (SSE)?