Changelog

gRPC (Google Remote Procedure Call) is a high‑performance, open‑source RPC framework designed for efficient communication between services. It uses Protocol Buffers (protobuf) as its interface definition language and serialization format. Unlike traditional REST APIs that rely on text‑based JSON or XML, protobuf encodes messages into a compact binary format, reducing the payload size and improving performance.

We would like to inform you that there are important differences between Resource Optimizer and Brotli Compression. Make sure you review the Caveats and known issues before considering the migration.

The number of IPv4 CIDR blocks supported for use with this feature has changed.

• New Early Data (0-RTT) behavior supported for use with ​Akamai​'s products. For users that have recently visited a site and are resuming a connection, Early Data allows browsers to send data to a server in the first round trip of a connection, without waiting for the TLS handshake to complete.
• New Enhanced Debug behavior that debugs requests that go through ​Akamai​ servers. It includes all the functionality provided by the existing Pragma debugging, but is more secure and provides additional information.

Optimizations to the Read Timeout behavior, including new First Byte Timeout option. For new Ion properties, Property Manager no longer adds the Read Timeout and Connect Timeout behaviors to the Accelerate delivery rule by default.

New Early Hints behavior supported for use with ​Akamai​'s Ion and Dynamic Site Accelerator products. With Early Hints, you can send an HTTP 103 status code with preliminary HTTP headers at the client request stage, so that a browser can preload critical website resources or preconnect to a specific domain while waiting for the final HTML response. You can configure this behavior in Property Manager or use EdgeWorkers to dynamically calculate the most optimal resources to send as Early Hints at the edge.

Brotli-on-the-Fly compression provides best-in-class solution with simplified architecture, compressing resources within the ​Akamai​ CDN in real-time. For more details, see Ion's tutorial on improving page load performance.

Edge IP Binding lets you deliver traffic from a small, static set of IP addresses in a scalable manner. Among other things, it lets you incorporate zero-rated billing, so you can allow specific traffic at no cost to end users.

Chase Redirects behavior has been removed from the Offload Origin rule. If you've selected NetStorage as your Origin Server, chase redirects are automatically enabled in backend to support its replication infrastructure.

You can leverage Speculation Rules API to improve the performance of Multi Page Apps (MPA) by prefetching or prerendering future navigations. This API promises a nearly-instant load of URLs that you specify in a special JSON structure, along with other rules that define how and when to trigger each speculative loading type.