Europe 2026
Why Eval++ Is the Next Great Compute Primitive — Sunil Pai & Matt Carey, Cloudflare
Overview
This talk introduces Eval++, a new compute primitive designed to enhance the development and deployment of AI agents. The core idea is to leverage Cloudflare's stateful serverless technology, specifically Durable Objects, as an ideal execution environment for agents. This approach enables long-running processes, persistence, and efficient scaling, fundamentally changing how developers can build and interact with AI-powered applications.
Who should watch
- AI engineers building agentic systems.
- Product managers exploring new AI infrastructure.
- Developers looking for stateful, scalable compute for AI applications.
- Anyone interested in the future of AI agent development and deployment.
Key takeaways
- Cloudflare's Durable Objects provide a stateful serverless compute primitive that is well-suited for AI agents, offering persistence and long-running capabilities.
- Dynamic Workers allow for the execution of arbitrary code, including LLM-generated code, within a secure, isolated sandbox, acting as an advanced `eval` primitive.
- This technology enables features like resumable streaming, multi-tab synchronization, and real-time collaborative AI experiences out-of-the-box.
- The platform supports multiple languages, including JavaScript, Python, and WebAssembly (WASM), with a focus on efficient execution and sandboxing.
- Cloudflare is developing a "harness" for coding agents that runs on Workers, aiming to provide a comprehensive infrastructure for agent development with features like code generation and execution.
- The approach shifts the burden of complex distributed systems engineering to the platform, allowing developers to focus on core agent logic and user experience.
- New products like M-, a CMS with a plugin system built on Dynamic Workers, demonstrate the practical application of these primitives for enhanced security and flexibility.
Notable quotes
*The only thing you can run is JavaScript in it, but it has no access to fetch, no APIs, nothing. And from the outside you can decide, okay, here are like four APIs.*
*Dynamic workers are like eval plus plus.*
*I believe that AI should be a multiplayer game.*
Unofficial community note. Prefer the recording for nuance.