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When building Cloudflare Workers that need persistent state, decide between KV and Durable Objects. This guide compares consistency, latency, storage limits, pricing, and shows how to implement a counter with KV and a WebSocket session with a Durable Object.
When a Cloudflare Worker needs mutable state, pick the right storage: KV for global, eventually consistent caching; Durable Objects for strong consistency, low‑latency per‑instance state. This guide compares options, explains trade‑offs, and shows a concrete example with validation steps.
When Durable Objects lose state, lag, or lose updates, the culprit is often a mis‑configured key, cold start, or race condition. This guide walks through common symptoms, ordered checks, quick fixes, and escalation steps.
Learn how to run edge‑based A/B tests with Cloudflare Workers, see a concrete Worker example, and understand the CPU‑time and caching limits.
Learn how to create a stateful counter that survives restarts, scales automatically, and handles concurrent increments using Cloudflare Workers Durable Objects. The guide covers setup, code, deployment, and verification.
Learn how to use Cloudflare Workers to inject security headers such as HSTS globally at the edge, with a ready‑to‑run example, deployment steps, and notes on limits and verification.
Learn how to configure Cloudflare Workers KV, bind it to a Worker, and perform low‑latency reads and writes while respecting consistency and throughput limits.
Learn how to use Cloudflare Workers KV as a low‑latency, globally distributed store for feature flags, including setup, a working example, and consistency trade‑offs.
Goal Identify the concurrency level at which Cloudflare Workers KV read operations exhibit significant latency spikes, and understand whether an implicit threshold or throttling mechanism exists. Constraints Requests target the same KV key from multiple Workers instances within a single region. Latency is measured relative to the typical <30 ms baseline f
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