# 
# --NOTE: THIS IS A CHAPTER-21 SPOILER NOT NAMED IN THE BOOK--
#
# Simple relative speeds of map, list comp, for, and generator.
# Run on an Intel-based macOS with CPython 3.12 (sans 3.14+ JIT?).
# Results in each category are listed fastest to slowest (today).
#


>>> import timeit
>>> rpt, num, = 5, 100


# --------Built-in function--------

# map
>>> min(timeit.repeat('list(map(abs, range(-100_000, 100_000)))', repeat=rpt, number=num))
0.990583126898855
>>> min(timeit.repeat('list(map(abs, range(-100_000, 100_000)))', repeat=rpt, number=num))
0.9804456511046737

# list comp
>>> min(timeit.repeat('[abs(x) for x in range(-100_000, 100_000)]', repeat=rpt, number=num))
1.1268831610213965
>>> min(timeit.repeat('[abs(x) for x in range(-100_000, 100_000)]', repeat=rpt, number=num))
1.1325057980138808
 
# for loop
>>> min(timeit.repeat('res=[]\nfor x in range(-100_000, 100_000): res.append(abs(x))', repeat=rpt, number=num))
1.2324059519451112
>>> min(timeit.repeat('res=[]\nfor x in range(-100_000, 100_000): res.append(abs(x))', repeat=rpt, number=num))
1.2300249920226634

# generator
>>> min(timeit.repeat('list(abs(x) for x in range(-100_000, 100_000))', repeat=rpt, number=num))
1.5676360160578042
>>> min(timeit.repeat('list(abs(x) for x in range(-100_000, 100_000))', repeat=rpt, number=num))
1.569781354861334


# --------User-defined function--------

>>> makefunc  =  'def inc(x): return x+10\n'   # function run by tested code

# list comp
>>> min(timeit.repeat('[inc(x) for x in range(-100_000, 100_000)]', setup=makefunc, repeat=rpt, number=num))
1.5938219740055501
>>> min(timeit.repeat('[inc(x) for x in range(-100_000, 100_000)]', setup=makefunc, repeat=rpt, number=num))
1.5938090682029724

# for loop
>>> min(timeit.repeat('res=[]\nfor x in range(-100_000, 100_000): res.append(inc(x))', setup=makefunc, repeat=rpt, number=num))
1.7023739479482174
>>> min(timeit.repeat('res=[]\nfor x in range(-100_000, 100_000): res.append(inc(x))', setup=makefunc, repeat=rpt, number=num))
1.7070050342008471

# map
>>> min(timeit.repeat('list(map(inc, range(-100_000, 100_000)))', setup=makefunc, repeat=rpt, number=num))
1.7311577030923218
>>> min(timeit.repeat('list(map(inc, range(-100_000, 100_000)))', setup=makefunc, repeat=rpt, number=num))
1.729776764055714

# generator
>>> min(timeit.repeat('list(inc(x) for x in range(-100_000, 100_000))', setup=makefunc, repeat=rpt, number=num))
2.229393493151292
>>> min(timeit.repeat('list(inc(x) for x in range(-100_000, 100_000))', setup=makefunc, repeat=rpt, number=num))
2.2455987599678338