httping(1) on Linux
The text ad72c5d206f4, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
measure the lateceny and throughput of a webserver
Flags it lists
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-f -
-g -
-h -
-i -
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-m -
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-o -
-p -
-q -
-r -
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-t -
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-z