We can gain insights when making requests to websites such as:
- Lookup time
- Connect time
- AppCon time
- Redirect time
- PreXfer time
- StartXfer time
We will make a request to a website that has caching enabled, the first hit will be a MISS:
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| $ curl -s -w '\nLookup time:\t%{time_namelookup}\nConnect time:\t%{time_connect}\nAppCon time:\t%{time_appconnect}\nRedirect time:\t%{time_redirect}\nPreXfer time:\t%{time_pretransfer}\nStartXfer time:\t%{time_starttransfer}\n\nTotal time:\t%{time_total}\n' -o /dev/null https://user-images.githubusercontent.com/567298/53351889-85572000-392a-11e9-9720-464e9318206e.jpg
Lookup time: 1.524465
Connect time: 1.707561
AppCon time: 0.000000
Redirect time: 0.000000
PreXfer time: 1.707656
StartXfer time: 1.897660
Total time: 2.451824
|
The next hit will be a HIT:
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| $ curl -s -w '\nLookup time:\t%{time_namelookup}\nConnect time:\t%{time_connect}\nAppCon time:\t%{time_appconnect}\nRedirect time:\t%{time_redirect}\nPreXfer time:\t%{time_pretransfer}\nStartXfer time:\t%{time_starttransfer}\n\nTotal time:\t%{time_total}\n' -o /dev/null https://user-images.githubusercontent.com/567298/53351889-85572000-392a-11e9-9720-464e9318206e.jpg
Lookup time: 0.004441
Connect time: 0.188065
AppCon time: 0.000000
Redirect time: 0.000000
PreXfer time: 0.188160
StartXfer time: 0.381344
Total time: 0.926420
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