| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
This improves the performance for the most ordinalized numbers (1st,
2nd, 3rd, etc).
```
require "benchmark/ips"
def o1(number)
abs_number = number.to_i.abs
if (11..13).include?(abs_number % 100)
"th"
else
case abs_number % 10
when 1; "st"
when 2; "nd"
when 3; "rd"
else "th"
end
end
end
def o3(number)
case number
when 1; "st"
when 2; "nd"
when 3; "rd"
when 4, 5, 6, 7, 8, 9, 10, 11, 12, 13; "th"
else
num_modulo = number.to_i.abs % 100
if 11 <= num_modulo && num_modulo <= 13
"th"
else
case num_modulo % 10
when 1; "st"
when 2; "nd"
when 3; "rd"
else "th"
end
end
end
end
def o4(number)
case number
when 1; "st"
when 2; "nd"
when 3; "rd"
when 4, 5, 6, 7, 8, 9, 10, 11, 12, 13; "th"
else
num_modulo = number.to_i.abs % 100
num_modulo %= 10 if num_modulo > 13
case num_modulo
when 1; "st"
when 2; "nd"
when 3; "rd"
else "th"
end
end
end
puts RUBY_DESCRIPTION
Benchmark.ips do |x|
x.report("orig") { o1(1); o1(2); o1(3); o1(4); o1(11); o1(111); o1(1523) }
x.report("ord3") { o3(1); o3(2); o3(3); o3(4); o3(11); o3(111); o3(1523) }
x.report("ord4") { o4(1); o4(2); o4(3); o4(4); o4(11); o4(111); o4(1523) }
x.compare!
end
```
```
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin15]
Warming up --------------------------------------
orig 25.305k i/100ms
ord3 121.146k i/100ms
ord4 124.944k i/100ms
Calculating -------------------------------------
orig 275.496k (± 2.4%) i/s - 1.392M in 5.054720s
ord3 1.649M (± 5.0%) i/s - 8.238M in 5.009801s
ord4 1.700M (± 7.0%) i/s - 8.496M in 5.031646s
Comparison:
ord4: 1700059.6 i/s
ord3: 1649154.9 i/s - same-ish: difference falls within error
orig: 275496.3 i/s - 6.17x slower
```
Closes #25020.
[lvl0nax, Jeremy Daer, Ryuta Kamizono]
|
