add curl benchmark

curl-benchmark.sh

@@ -0,0 +1,37 @@
+
+
+echo -e "
+     time_namelookup:  %{time_namelookup}s\n
+        time_connect:  %{time_connect}s\n
+     time_appconnect:  %{time_appconnect}s\n
+    time_pretransfer:  %{time_pretransfer}s\n
+       time_redirect:  %{time_redirect}s\n
+  time_starttransfer:  %{time_starttransfer}s\n
+                     ----------\n
+          time_total:  %{time_total}s\n
+" > curl-format.txt
+
+curl -w "@curl-format.txt" -o /dev/null -s "https://packagemanager.posit.co/cran/latest/src/contrib/arrow_16.1.0.tar.gz"
+
+time_namelookup:  0.006233s        
+time_connect:  0.125975s     
+time_appconnect:  0.372086s    
+time_pretransfer:  0.373104s       
+time_redirect:  0.000000s  
+time_starttransfer:  0.499798s                     
+----------          
+time_total:  0.500019s⏎  
+
+curl -w "@curl-format.txt" -o NUL -s "https://cran.devxy.io/arm64/rhel9/latest/src/contrib/arrow_16.1.0.tar.gz"
+
+time_namelookup:  0.003505s        
+time_connect:  0.018930s     
+time_appconnect:  0.041507s    
+time_pretransfer:  0.041587s       
+time_redirect:  0.000000s  
+time_starttransfer:  0.056802s                     
+----------          
+time_total:  0.057002s⏎ 
+
+
+rm curl-format.txt