+.PP
+Perhaps surprisingly,
+keyword arguments have a relatively small performance impact.
+On the author's aging laptop,
+a call to a simple function,
+passing two out of three keyword arguments,
+takes about 30 cycles longer than
+calling a standard function which just takes integer arguments.
+On the other hand,
+quite a lot of code is involved in decoding keyword arguments,
+so code size will naturally suffer.