\[\frac{\left|a - b\right|}{2}\]
Test:
fabs fraction 2
Bits:
128 bits
Bits error versus a
Bits error versus b
Time: 1.5 s
Input Error: 0
Output Error: 0
Log: ⚲
Profile: 🕒
\(\frac{\left|a - b\right|}{2}\)
  1. Started with
    \[\frac{\left|a - b\right|}{2}\]
    0
  2. Removed slow pow expressions

Original test:


(lambda ((a default) (b default))
  #:name "fabs fraction 2"
  (/ (fabs (- a b)) 2))