What about k6 cloud -- from Grafana labs? https://grafana.com/products/cloud/k6/?src=k6io
Grafana Labs
With Grafana Cloud k6, you can easily run cloud-based performance tests for up to 1 million concurrent virtual users or 5 million requests/second.




Workers Paid plan is separate from any other Cloudflare plan (Free, Professional, Business) you may have.



// Only default cache can be purged via API
const cache = caches.default;
await cache.put(`https://fake.host/${userId}`, Response.json(userData, {
headers: {
"cache-tag": "user"
// Other headers
}
}));