Adds changelog entry for cpu_ms limit bump

Author: mikenomitch

src/content/changelog/workers/2025-03-25-higher-cpu-limits.mdx

@@ -0,0 +1,49 @@
+---
+title: Run Workers for up to 5 minutes of CPU-time
+description: Workers now support up to 5 minutes of CPU time per request. Allowing more CPU-intensive workloads.
+products:
+  - workers
+date: 2025-03-25T17:00:00Z
+---
+
+import { Render, TypeScriptExample, WranglerConfig } from "~/components";
+
+You can now run a Worker for up to 5 minutes of CPU time for each request.
+
+Previously, Workers could only run for up to 30 seconds of CPU time. This meant that
+some compute-intensive tasks were impossible to do with a Worker. For instance,
+a user might want to take the cryptographic hash of a large file from R2. If
+this computation ran for over 30 seconds, the Worker request would have previously
+timed out.
+
+By default, Workers are still limited to 30 seconds of CPU time. This protects developers
+from incurring accidental cost due to buggy code.
+
+By changing the `cpu_ms` value in your Wrangler configuration, you can opt in to
+any value up to 300000 (5 minutes).
+
+<WranglerConfig>
+
+```jsonc
+{
+	// ...rest of your configuration...
+	"limits": {
+		"cpu_ms": 300000,
+	},
+	// ...rest of your configuration...
+}
+```
+
+</WranglerConfig>
+
+:::note
+CPU time is the amount of time the CPU actually spends doing work during a given request.
+If a Worker's request makes a sub-request and waits for that request to come back before
+doing additional work, this time spent waiting **is not** counted towards CPU time.
+
+Workers were able to run for more than 30 seconds of total time prior to this change, only
+CPU time was limited.
+:::
+
+For more information, see documentation on [Wrangler configuration for `cpu_ms`](/workers/wrangler/configuration/#limits)
+and on [Workers CPU time limits](/workers/platform/limits/#cpu-time).

src/content/docs/workers/wrangler/configuration.mdx

@@ -398,7 +398,9 @@ watch_dir = "build_watch_dir"
 
 ## Limits
 
-You can impose limits on your Worker's behavior at runtime. Limits are only supported for the [Standard Usage Model](/workers/platform/pricing/#example-pricing-standard-usage-model). Limits are only enforced when deployed to Cloudflare's network, not in local development. The CPU limit can be set to a maximum of 30,000 milliseconds (30 seconds).
+You can impose limits on your Worker's behavior at runtime. Limits are only supported for the [Standard Usage Model](/workers/platform/pricing/#example-pricing-standard-usage-model).
+Limits are only enforced when deployed to Cloudflare's network, not in local development. The CPU limit
+can be set to a maximum of 300,000 milliseconds (5 minutes).
 
 <Render file="isolate-cpu-flexibility" /> <br />