IPaddr.new().to_i performance

ipaddr-to_i-perf.rb

require 'ipaddr'
require 'benchmark'

def iptoint1(ip)
  IPAddr.new(ip, Socket::AF_INET).to_i
end

def iptoint2(ip)
  if (ip.kind_of?(String) &&
      ip =~ /^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$/)
    ip = be_to_ui(Regexp.last_match().to_a.slice(1..4))
  end
  return ip
end

def be_to_ui(s)
  i = 0
  s.each { |b| i = ((i << 8) | (b.to_i & 0x0ff)) }
  return i
end

def rand_ip
  IPAddr.new(rand(2**32), Socket::AF_INET)
end

Benchmark.bm do |x|
  x.report { 100000.times do; iptoint1(rand_ip); end; }
  x.report { 100000.times do; iptoint2(rand_ip); end; }
end

#     user     system      total        real
# 0.280000   0.000000   0.280000 (  0.287339)
# 0.170000   0.000000   0.170000 (  0.169714)