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Google Cloud Functions (2nd gen): CORS on Cloud Run, ingress settings, and IAM invoker for browsers
Gen2 functions are Cloud Run services—configure CORS on the service or at the load balancer in front.
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gcpcloud-functionscors
Min instances
Setting min instances removes some cold starts—compare OPTIONS latency before and after.
CPU always allocated changes billing—do not confuse cost spikes with CORS misconfigurations.
VPC connector
Egress through a connector can change NAT IP—update partner allowlists alongside CORS docs.