resperf(1) on Linux
The text 2fd9126672d5, as Debian 12 (Bookworm) shipped it.
test the resolution performance of a caching DNS server
Flags it lists
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-C -
-F -
-L -
-M -
-O -
-P -
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-b -
-c -
-d -
-f -
-i -
-m -
-p -
-q -
-r -
-s -
-t -
-x -
-y