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Your data is stored in Cloud Storage buckets, and fellow developers report that downloading data from Cloud Storage causes slow API performance.
You need to investigate the issue to gather details for the GCP support team.
Which command should you execute?
Explanation:
The correct command to diagnose performance issues with Cloud Storage is gsutil perfdiag. This command runs a suite of performance diagnostics tests on the specified bucket, generating a detailed report (output.json in this case) which can be shared with GCP support. The other options are invalid: gsutil test (A) is not a valid command, gcloud compute scp (C) is for copying files to/from Compute Engine instances, and gcloud services test (D) is not a valid command for this scenario.