Switch from using Fraction to Decimal due to much better benchmarked …

…speeds

wrapdisc/util/float.py

@@ -1,5 +1,5 @@
 """float utilities."""
-from fractions import Fraction
+from decimal import Decimal
 from math import ceil, floor, inf, nextafter
 from typing import Sequence, overload
 
@@ -9,7 +9,7 @@ def div_float(x: float, y: int | float, /) -> float:
 
     Intermediate string representations are used.
     """
-    return float(Fraction(str(x)) / Fraction(str(y)))
+    return float(Decimal(str(x)) / Decimal(str(y)))
 
 
 def sum_floats(nums: Sequence[int | float]) -> float:
@@ -18,7 +18,7 @@ def sum_floats(nums: Sequence[int | float]) -> float:
     Intermediate string representations are used.
     """
     # Note: math.fsum is not used because it was observed to not work well for the example [9.9, .05].
-    return float(sum(Fraction(str(f)) for f in nums))
+    return float(sum(Decimal(str(f)) for f in nums))
 
 
 def next_float(val: float, /) -> float:
@@ -47,7 +47,7 @@ def round_nearest(num, to):
     Intermediate string representations are used.
     """
     # Ref: https://stackoverflow.com/a/70210770/
-    num, to = Fraction(str(num)), Fraction(str(to))
+    num, to = Decimal(str(num)), Decimal(str(to))
     return float(round(num / to) * to)
 
 
@@ -57,7 +57,7 @@ def round_down(num: float, to: float) -> float:
     Intermediate string representations are used.
     """
     # Ref: https://stackoverflow.com/a/70210770/
-    num, to = Fraction(str(num)), Fraction(str(to))
+    num, to = Decimal(str(num)), Decimal(str(to))
     return float(floor(num / to) * to)
 
 
@@ -67,5 +67,5 @@ def round_up(num: float, to: float) -> float:
     Intermediate string representations are used.
     """
     # Ref: https://stackoverflow.com/a/70210770/
-    num, to = Fraction(str(num)), Fraction(str(to))
+    num, to = Decimal(str(num)), Decimal(str(to))
     return float(ceil(num / to) * to)