Optimizing Compute for Agentic Systems With New Request Handoff Functionality
Blog post from Fastly
Fastly has introduced a new request handoff functionality in version 0.13.0 of its Rust SDK, designed to enhance efficiency by reducing CPU usage and wall clock time for customers. The updated pricing model now focuses solely on requests and vCPU consumption, incentivizing customers to write more efficient code. The new feature addresses the need for supporting long-running backend requests by allowing asynchronous handoff from Wasm guests to the host, which continues to process requests independently, freeing up resources and improving request-per-second (RPS) throughput. This is particularly beneficial for computationally intensive tasks like AI gateways and long-running uploads, reducing the impact of slow or non-responsive backends on edge services. Additionally, it offers the ability to modify headers on eventual responses, helping manage heavy computational loads with better resource allocation and error handling. The functionality is currently available for testing in Viceroy, Fastly's local environment, with plans to expand it to other SDKs.
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