Method calibrate

lib/bcrypt/engine.rb:119–126

Returns the cost factor which will result in computation times less than +upper_time_limit_in_ms+. Example: BCrypt::Engine.calibrate(200) #=> 10 BCrypt::Engine.calibrate(1000) #=> 12 # should take less than 200ms BCrypt::Password.create("woo", :cost => 10) # should take less than 1000ms BCrypt::Password.create("woo", :cost => 12)

(upper_time_limit_in_ms)

    #   # should take less than 1000ms
    #   BCrypt::Password.create("woo", :cost => 12)
    def self.calibrate(upper_time_limit_in_ms)
      (BCrypt::Engine::MIN_COST..BCrypt::Engine::MAX_COST-1).each do |i|
        start_time = Time.now
        Password.create("testing testing", :cost => i+1)
        end_time = Time.now - start_time
        return i if end_time * 1_000 > upper_time_limit_in_ms
      end
    end

    # Autodetects the cost from the salt string.
    def self.autodetect_cost(salt)