Measure Latency With Curl

curlit.sh

#!/usr/bin/env bash
#
# curl wrapper returning timing information.
#
# ORIGIN: https://github.com/mat/dotfiles/blob/master/bin/curlt
#
# curl format adapted from
#  http://josephscott.org/archives/2011/10/timing-details-with-curl/
#
# Example usage:
#   $ curlt http://www.apple.com
#   $ time curlt http://www.apple.com -v

set -e

curl_format='{
 "time_namelookup": %{time_namelookup},
 "time_connect": %{time_connect},
 "time_appconnect": %{time_appconnect},
 "time_pretransfer": %{time_pretransfer},
 "time_redirect": %{time_redirect},
 "time_starttransfer": %{time_starttransfer},
 "time_total": %{time_total}
}'

exec curl -w "$curl_format" -D >(cat) -o /dev/null -s "$@"