require 'fruity'
class Array
def rodrigo_except(*values)
self - values
end
def niels_except value
value = value.kind_of?(Array) ? value : [value]
self - value
end
end
ARY = [2,4,6,3,8]
compare do
soziev { a = ARY.dup; a.delete(3); a }
steve { a = ARY.dup; a -= [3]; a }
barlop { a = ARY.dup; a.delete_if{ |i| i == 3 }; a }
rodrigo { a = ARY.dup; a.rodrigo_except(3); }
niels { a = ARY.dup; a.niels_except(3); }
end
# >> Running each test 4096 times. Test will take about 2 seconds.
# >> soziev is similar to barlop
# >> barlop is faster than steve by 2x ± 1.0
# >> steve is faster than rodrigo by 4x ± 1.0
# >> rodrigo is similar to niels
再次使用包含大量重复项的更大数组:
class Array
def rodrigo_except(*values)
self - values
end
def niels_except value
value = value.kind_of?(Array) ? value : [value]
self - value
end
end
ARY = [2,4,6,3,8] * 1000
compare do
soziev { a = ARY.dup; a.delete(3); a }
steve { a = ARY.dup; a -= [3]; a }
barlop { a = ARY.dup; a.delete_if{ |i| i == 3 }; a }
rodrigo { a = ARY.dup; a.rodrigo_except(3); }
niels { a = ARY.dup; a.niels_except(3); }
end
# >> Running each test 16 times. Test will take about 1 second.
# >> steve is faster than soziev by 30.000000000000004% ± 10.0%
# >> soziev is faster than barlop by 50.0% ± 10.0%
# >> barlop is faster than rodrigo by 3x ± 0.1
# >> rodrigo is similar to niels
甚至更大,有更多的副本:
class Array
def rodrigo_except(*values)
self - values
end
def niels_except value
value = value.kind_of?(Array) ? value : [value]
self - value
end
end
ARY = [2,4,6,3,8] * 100_000
compare do
soziev { a = ARY.dup; a.delete(3); a }
steve { a = ARY.dup; a -= [3]; a }
barlop { a = ARY.dup; a.delete_if{ |i| i == 3 }; a }
rodrigo { a = ARY.dup; a.rodrigo_except(3); }
niels { a = ARY.dup; a.niels_except(3); }
end
# >> Running each test once. Test will take about 6 seconds.
# >> steve is similar to soziev
# >> soziev is faster than barlop by 2x ± 0.1
# >> barlop is faster than niels by 3x ± 1.0
# >> niels is similar to rodrigo
arr = [2, 4, 6, 3, 8, 10, 3, 12]
arr.delete_at arr.index 3
#This will modify arr as [2, 4, 6, 8, 10, 3, 12] where first occurrence of 3 is deleted. Returns the element deleted. In this case => 3.