curl performance tricks

curl.bash

## All Stats
curl -o /dev/null -s -w "\n\
url_effective: %{url_effective}\n\
http_code: %{http_code}\n\
http_connect: %{http_connect}\n\
time_namelookup: %{time_namelookup}\n\
time_connect: %{time_connect}\n\
time_appconnect: %{time_appconnect}\n\
time_pretransfer: %{time_pretransfer}\n\
time_redirect: %{time_redirect}\n\
time_starttransfer: %{time_starttransfer}\n\
size_download: %{size_download}\n\
size_upload: %{size_upload}\n\
size_header: %{size_header}\n\
size_request: %{size_request}\n\
speed_download: %{speed_download}\n\
speed_upload: %{speed_upload}\n\
content_type: %{content_type}\n\
num_connects: %{num_connects}\n\
num_redirects: %{num_redirects}\n\
redirect_url: %{redirect_url}\n\
ftp_entry_path: %{ftp_entry_path}\n\
ssl_verify_result: %{ssl_verify_result}\n\
TTFB: %{time_starttransfer}\n\
Total Time: %{time_total}\n" \
http://www.example.com


# example from http://www.pinoytux.com/linux/capture-time-to-first-byte-using-curl
curl -o /dev/null -w "Connect: %{time_connect} TTFB: %{time_starttransfer} Total time: %{time_total} \n" http://linux.com

# example from http://archive09.linux.com/articles/57715
echo "`curl -s -o /dev/null -w '%{time_starttransfer}-%{time_pretransfer}' http://linux.com/`"|bc

# a nice example from https://josephscott.org/archives/2011/10/timing-details-with-curl/
# Step one: create a new file, curl-format.txt, and paste in
#  n
#              time_namelookup:  %{time_namelookup}n
#                 time_connect:  %{time_connect}n
#              time_appconnect:  %{time_appconnect}n
#             time_pretransfer:  %{time_pretransfer}n
#                time_redirect:  %{time_redirect}n
#           time_starttransfer:  %{time_starttransfer}n
#                              ----------n
#                   time_total:  %{time_total}n
#  n
# Step two, make a request:
curl -w "@curl-format.txt" -o /dev/null -s http://wordpress.com/