DOS fnando/password_strength

benchmark_password_strength.rb

require 'securerandom'
require 'password_strength'
require 'benchmark'

def random_string(len)
  SecureRandom.base64(len)[0...len]
end


Benchmark.bm do |x|
  30.times do |n|
    len = (n**4).to_i
    pass = random_string(len)
    x.report("Len: #{len}".ljust(13, ' ')) { PasswordStrength.test("username", pass) }
  end
end

output_sample.txt

                 user     system      total        real
Len: 0         0.000000   0.000000   0.000000 (  0.002083)
Len: 1         0.000000   0.000000   0.000000 (  0.000051)
Len: 16        0.000000   0.000000   0.000000 (  0.000332)
Len: 81        0.000000   0.000000   0.000000 (  0.001429)
Len: 256       0.000000   0.010000   0.010000 (  0.005734)
Len: 625       0.020000   0.000000   0.020000 (  0.020888)
Len: 1296      0.080000   0.000000   0.080000 (  0.078562)
Len: 2401      0.220000   0.000000   0.220000 (  0.223002)
Len: 4096      0.570000   0.000000   0.570000 (  0.570973)
Len: 6561      1.310000   0.010000   1.320000 (  1.322156)
Len: 10000     2.810000   0.010000   2.820000 (  2.825737)
Len: 14641     6.410000   0.030000   6.440000 (  6.472998)
Len: 20736    12.350000   0.060000  12.410000 ( 12.479648)
Len: 28561    33.500000   0.260000  33.760000 ( 34.125364)
Len: 38416    62.250000   0.370000  62.620000 ( 63.056908)
Len: 50625   123.370000   1.150000 124.520000 (126.204006)
Len: 65536   246.240000   2.800000 249.040000 (258.125013)
Len: 83521   387.200000   2.680000 389.880000 (393.897267)
Len: 104976  593.270000   3.540000 596.810000 (605.670005)
Len: 130321  975.180000  10.110000 985.290000 (1034.482099)
Len: 160000  1387.81000   9.150000 1396.96000 (2450.387897)

password_strength_times.png