diff --git a/how_to b/how_to
index e268a52..05d4aed 100644
--- a/how_to
+++ b/how_to
@@ -1151,6 +1151,9 @@ cURL cheatsheet:
             curl -v <URL>
     Follow redirects:
         curl -L <URL>
+    Debug HTTP request response times:
+        # https://susam.in/maze/timing-with-curl.html
+        curl -L -w "time_namelookup: %{time_namelookup}\ntime_connect: %{time_connect}\ntime_appconnect: %{time_appconnect}\ntime_pretransfer: %{time_pretransfer}\ntime_redirect: %{time_redirect}\ntime_starttransfer: %{time_starttransfer}\ntime_total: %{time_total}\n" https://example.com/
 
 GPG:
     Renew expired GPG public keys: