We shifted our backend Node.js services to AWS Graviton2 and immediately shaved about 20% off EC2 costs for one of our enterprise clients, all without touching configs or autoscaling. The ARM chips delivered better price-performance, so p95 latency stayed steady even when traffic spiked.
One optimization that saved real money was moving steady-state Node.js backend services from x86 to AWS Graviton instances after validating native dependencies. It cut spend because Graviton delivered better price-performance for CPU-bound workloads, and p95 latency held steady since the services were not instruction-set sensitive and were already right-sized for consistent traffic. Albert Richer, Founder, WhatAreTheBest.com.