dominikh

require 'benchmark'
n = 1_000_000
s = "a b c d e f g h"
Benchmark.bmbm do |x|
  x.report("Scan (regexp)")      { n.times { s.scan(/h/).empty? } }
  x.report("Scan (string)")      { n.times { s.scan("h").empty? } }
  x.report("Include")   { n.times { s.include?("h") } }
  x.report("=~")        { n.times { s =~ /h/} }

  x.report("Scan (regexp) (not findable)")      { n.times { s.scan(/i/).empty? } }

dominikh

require "benchmark"

def f(i); i; end

array = Array.new(1_000_000) { rand.to_s }

TESTS = 5
Benchmark.bmbm do |results|
  results.report("null:") { TESTS.times { array.each { |i| f(i) } } }
  results.report("sliced each:") { TESTS.times { array[1,array.size-2].each { |i| f(i) } } }

dominikh

require 'benchmark'
n = 1_000_000
Benchmark.bmbm do |x|
  x.report("Double quotes") do
    n.times do
      str = "A simple string"
    end
  end

  x.report("Single quotes") do

dominikh

require "benchmark"
 
n = 1_000_000
s = "a string to split"
 
d1 = / /
d2 = " "
 
Benchmark.bmbm do |x| 
  x.report("Regexp") do

dominikh

require 'benchmark'

TIMES = 1_000_000
string = ' some weird  string  with       spaces in it   '

Benchmark.bmbm do |x|
  x.report("gsub + regexp") do
    TIMES.times do |t|
      string.gsub(/\s+/,'-')
    end

dominikh

class A < Struct.new(:a, :b)
end
B = Struct.new(:a, :b)

require 'benchmark'

Benchmark.bmbm 20 do |r|
  n = 10_000_000

  a = A.new(1,2)

dominikh

require 'benchmark'

TIMES = 1_000_000

Benchmark.bmbm() do |x|
  # note: this regexp will only be built once for all iterations
  x.report("literal regexp") do
    TIMES.times { /regexp/ }
  end

dominikh

require 'benchmark'

TIMES = 1_000_000

r = /regexp/
s = "regexp"

Benchmark.bmbm do |x|
  x.report("r =~ s") do
    TIMES.times { r =~ s }

dominikh

require 'benchmark'

TIMES = 1_000_000

s = "a string"

Benchmark.bmbm do |x|
  x.report("delete") do
    TIMES.times { s.delete(" ") }
  end

dominikh

require 'benchmark'

TIMES = 1_000_000

s = "a string"

Benchmark.bmbm do |x|
  x.report("delete") do
    TIMES.times { s.delete("rin") }
  end