HOW BOOKING.COM CUT NODE.JS COSTS BY 38% WITH WATT

Summary from the TLDR Dev newsletter

Booking.com moved a major Node.js rendering service from pm2 clustering to Watt worker threads, cutting compute costs by 38% with 30% fewer pods, 20% less memory per pod, and up to 10% lower tail latency. The migration required no service code changes, and production tests showed 40% to 50% more throughput within the same latency target.