Sse uses too much cpu

[Barre]

When a user reaches a page on my website that uses sse, the CPU gets pinned to 100% usage and does not go down until the process is restarted.

Example endpoint: https://api.merklemap.com/live-domains

To Reproduce
Steps to reproduce the behavior:

1. Produce an endpoint that produce data over sse (or proxy to the api above).
2. Observe the cpu usage

If it's an issue with Cloudflare Tunnel:

ID                                   NAME      CREATED              CONNECTIONS               
e87feb54-2f48-4377-a0fe-2a8e97272530 merklemap 2024-09-04T16:39:25Z 1xams08, 1xams15, 2xhel01 

With default settings.

Environment and versions

Description:	Debian GNU/Linux 12 (bookworm)
Release:	12
Codename:	bookworm

• Architecture: AMD EPYC 9454P
• cloudflared version 2024.8.3 (built 2024-08-22-1348 UTC)

[flpydsk]

SSE is a undocumented feature on CF and not guaranteed to work. while cloudflared should not do that its not something that should be relied on or used in prod. use web sockets instead