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Use Curl to identify bottlenecks in your service layers.
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| \n | |
| Size: %{size_download}\n | |
| DNS: %{time_namelookup}\n | |
| Connect: %{time_connect}\n | |
| SSL: %{time_appconnect}\n | |
| Transfer: %{time_starttransfer}\n | |
| Total: %{time_total}\n |
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| # SSL request to hostname that is not in DNS | |
| > curl -o /dev/null -w @curlformat https://beta.finance.yahoo.com | |
| % Total % Received % Xferd Average Speed Time Time Time Current | |
| Dload Upload Total Spent Left Speed | |
| 100 255k 0 255k 0 0 233k 0 --:--:-- 0:00:01 --:--:-- 233k | |
| Size: 261255 | |
| DNS: 0.522 | |
| Connect: 0.536 | |
| SSL: 0.667 | |
| Transfer: 0.772 | |
| Total: 1.094 | |
| # Repeat another 2 requests to the same host: DNS is now cached, saving 0.5 seconds. | |
| # The final request re-uses the already open connection that Curl is holding, making | |
| # DNS lookup, Connection time, and SSL handshake time all 0. | |
| > curl -o /dev/null -w @../curlformat https://beta.finance.yahoo.com -o /dev/null https://beta.finance.yahoo.com | |
| % Total % Received % Xferd Average Speed Time Time Time Current | |
| Dload Upload Total Spent Left Speed | |
| 100 255k 0 255k 0 0 108k 0 --:--:-- 0:00:02 --:--:-- 109k | |
| Size: 261238 | |
| DNS: 0.005 | |
| Connect: 0.086 | |
| SSL: 0.230 | |
| Transfer: 1.930 | |
| Total: 2.341 | |
| 100 255k 0 255k 0 0 495k 0 --:--:-- --:--:-- --:--:-- 1048k | |
| Size: 261255 | |
| DNS: 0.000 | |
| Connect: 0.000 <-- connection pool - 80ms connect time already completed above | |
| SSL: 0.000 <-- connection pool - 140ms SSL handshake already completed above | |
| Transfer: 0.064 | |
| Total: 0.515 |
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curl -o /dev/null -w @curlformat https://beta.finance.yahoo.comgave me aWarning: Failed to read curlformat.curlformat.txtworks.