curl healthchcheck example %{http_code} %{time_total}

By OK - 
$ URL=https://example.com
$ curl "$URL" -s -o /dev/null -w \
> "response_code: %{http_code}\n
> dns_time: %{time_namelookup}
> connect_time: %{time_connect}
> pretransfer_time: %{time_pretransfer}
> starttransfer_time: %{time_starttransfer}
> total_time: %{time_total}
> "
response_code: 200

dns_time: 0.029
connect_time: 0.046
pretransfer_time: 0.203
starttransfer_time: 0.212
total_time: 0.212

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