Bigquery.go导出作业比WebGUI慢

Follow up to this

I have now found that my 2 jobs take 2-4 seconds and 8-15 seconds respectively.

When I run my two jobs from the Bigquery.go client library they are done after 50-70 seconds. I use job.Wait() and have tried my own polling function (polling every 5 seconds) but there is not a noticeably change. Is this an issue in the client library, on the link level or my code?

Job 1 (DB Query, ~5s when checking by console)

job, err := database_query.Run(ctx)
if err != nil {
    return err
}

jobID := job.ID()
job, err = client.JobFromID(ctx, jobID)
if err != nil {
    return err
}

status, err := job.Wait(ctx)
if err != nil {
    return err
}

Job 2 (~12s when checking by console)

job_extract, err := extractor.Run(ctx)
if err != nil {
    return err
}

status, err = job_extract.Wait(ctx)
if err != nil {
    return err
}
if status.Err() != nil {
    handler.Logger.Criticalf("Job failed with error %v", status.Err())
    return status.Err()
}

After this there is a simple return with code 200.

I know that there is code which does not do anything which will be removed later.