Cloudflare limits the number of distinct Dynamic Workers with in-flight requests. Multiple in-flight requests to the same Dynamic Worker count as one toward this limit.
| Context | Concurrent Dynamic Workers |
|---|---|
| Worker request | 4 |
| Durable Object | 10 (previously 4) |
In a Worker, each request has its own input/output (I/O) context. Each request can therefore have up to four distinct Dynamic Workers with in-flight requests.
A Durable Object shares one I/O context across all concurrent requests to the same object. Those requests can collectively have up to ten distinct Dynamic Workers with in-flight requests. To set lower CPU time or subrequest limits, refer to Custom resource limits.