$ node hz-khz.js
benchmarking /Users/isaacs/dev-src/js/node-bench/examples/hz-khz.js
Please be patient.
Scores: (bigger is better)

kHz
Raw:
 > 0.913086913086913
 > 0.9110889110889111
 > 0.9180819180819181
 > 0.9110889110889111
 > 0.9120879120879121
Average (mean) 0.9130869130869131

hz
Raw:
 > 0.001
 > 0.001
 > 0.001
 > 0.001
 > 0.001
Average (mean) 0.001

Winner: kHz
Compared with next highest (hz), it's:
99.89% faster
913.09 times as fast
2.96 order(s) of magnitude faster