Introducing On-Demand CPU and Memory Profiling with Flamegraphs for Workers and Durable Objects
Cloudflare, Friday, October 9th, 2026
Cloudflare adds on-demand CPU and memory profiling with interactive flamegraphs for production Workers and Durable Objects.
Cloudflare now supports on-demand CPU and memory profiling for Workers and Durable Objects running in production.
From the Workers Observability tab or the new cf CLI, developers can profile an active Worker version for a chosen duration, view results as an interactive flamegraph or table, and download the pprof file.
Cloudflare recommends enabling source maps for TypeScript Workers and says its internal teams have already used profiling to cut CPU and memory usage and fix out-of-memory errors.