n7SBsQub

1require 'benchmark'
2
3### data
4
5N = 1_000_000
6email = "tj@yahoo.co.uk"
7list = ["gmail.com", "hotmail.com", "yahoo.com", "yahoo.co.uk", "clayton.ga.dmv.us.gov", "ibm.com"]
8
9Benchmark.bm(30) do |bm|
10  
11  ### string compare
12  
13  bm.report("string comapre") do
14    N.times do
15      list.include?(email.split('@').last.downcase)
16    end
17  end
18  
19  ### regex compare
20  
21  bm.report("regex compare") do
22    list = list.map do |domain|
23      Regexp.new(domain)
24    end
25    email_domain = email.split('@').last
26    N.times do
27      list.reject do |domain|
28        not (domain =~ email_domain)
29      end
30    end
31  end
32  
33  ### compiled regex compare
34  
35  bm.report("compiled regex comapre") do
36    pattern = Regexp.new("(#{list.join("|")})")
37    N.times do
38      pattern =~ email
39    end
40  end
41  
42end