Product limits

Keep these limitations in mind when designing your EdgeWorkers functions. These limitations apply to all EdgeWorkers functions regardless of the selected resource tier.

You can also refer to the limitations that are applied based on the resource tier you selected for your EdgeWorker ID.

Description	Limit
Supported delivery products	Ion Dynamic Site Accelerator (DSA) Adaptive Media Delivery Download Delivery Object Delivery API Acceleration
Supported delivery method	Enhanced TLS When you've applied a custom certificate to a property configuration, the associated Edge hostname uses the `.edgekey.net` domain. Standard TLS, used to serve non PCI compliant traffic over HTTP or HTTPS via an `edgesuite.net` edge hostname, is also supported. At the moment you need to contact your Akamai representative or reach out via the Serverless Slack channel to opt-in to this new feature. EdgeWorkers is not supported on Akamai CDNs created to accommodate unique regional or governmental requirements. This limitation currently includes China CDN.
Execution restrictions	EdgeWorkers functions cannot be executed by an Edge Site Includes fragment request.
Number of activated EdgeWorker scripts per account	25,000 on the staging network 25,000 on the production network
Number of EdgeWorker scripts executed per request	1
Compressed size for a code bundle	512 KB
Uncompressed size for a code bundle	1 MB
Maximum response header size for HTTP sub-requests	8000 bytes
Maximum body size for responses created through the `respondWith()` method	2048 characters
Maximum body size for responses from origin to an EdgeWorkers function, using `httpRequest()`	128 KB when using `json()` or `text()` to buffer the entire response. 5 MB when using `body` to read the response as a stream.
Maximum body size for responses from an EdgeWorkers function to a browser when the response is passed through as a string	100,000 bytes if you pass a string to `createResponse` in `responseProvider` No direct limit if you pass a stream to `createResponse` in `responseProvider`.
Maximum body size for responses from an EdgeWorkers function to a client browser	2048 characters if you use `request.respondWith()` in the `onClientRequest` or `onClientResponse` event handler.
Maximum body size when `request.text()` or `request.json()` is called in the `responseProvider` event handler	16 KB
JavaScript initialization timeout The JavaScript initialization time does not include the time it takes to fetch and decompress the EdgeWorkers code bundle.	100 milliseconds
JavaScript CPU initialization timeout	30 milliseconds