Cloudflare Launches On‑Demand CPU and Memory Profiling for Workers and Durable Objects

Cloudflare has added on‑demand CPU and memory profiling to its Workers platform, enabling developers to capture interactive flamegraphs directly from the Workers Observability page or via the CLI. The new feature lets users request a profile for an active Worker or Durable Object, specify duration and version, and view a flamegraph that shows function‑level CPU or memory usage. Cloudflare’s own teams have used the tool to spot duplicate work in JSON processing, eliminate redundant metric calls, and remove a partially disabled Prometheus code path that was causing out‑of‑memory errors. By profiling in production, developers can pinpoint hotspots, reduce resource consumption, and improve reliability of edge applications.