Class: Timer

Inherits:
Object
  • Object
show all
Defined in:
lib/gem_with_extension_example/timer.rb

Overview

require ‘/Users/sean/dev/gems/gem_with_extension_example/lib/gem_with_extension_example/util.rb’

Constant Summary collapse

DIGITS_OF_PRESCISION =

ToDo Mode Flags:

:side_by_side (on by default)
:consecutive_runs (using redis)(off by default)

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@@max_name_length = 
0
@@max_whole_digits = 
1
@@timer_list = 
[]
@@mode = 
:side_by_side

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ Timer

private :digits, :update_digit_count



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# File 'lib/gem_with_extension_example/timer.rb', line 21

def initialize(name)
  @name = name
  clear
  @@max_name_length = name.length if name.length > @@max_name_length
  @@timer_list << self
end

Instance Attribute Details

#elapsed ⇒ Object (readonly)

Returns the value of attribute elapsed.



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# File 'lib/gem_with_extension_example/timer.rb', line 17

def elapsed
  @elapsed
end

Class Method Details

.clear ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 87

def self.clear
  @@max_name_length = 0
  @@max_whole_digits = 1
  @@timer_list = []
end

.digits(n) ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 71

def digits(n)
  if n > 9
    d = Math.log10(n).to_i + 1
  elsif n < -9
    d = Math.log10(n * -1).to_i + 1
  else
    d = 1
  end
  d
end

.set_mode(mode) ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 28

def set_mode(mode)
  @@mode = mode #:side_by_side, :simple
end

.to_s ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 31

def to_s
  # Process pair comparison
  pair_comparison = @@timer_list.count == 2
  speed_multiple = nil
  greater_index = nil
  if pair_comparison
    if @@timer_list[0].elapsed > @@timer_list[1].elapsed
      greater_index = 1
      speed_multiple = @@timer_list[0].elapsed / @@timer_list[1].elapsed
    else
      greater_index = 0
      speed_multiple = @@timer_list[1].elapsed / @@timer_list[0].elapsed
    end
  end
  total_time = @@timer_list.inject(0.0) { |result, t| result + t.elapsed }

  # construct output string
  s = ""
  @@timer_list.each_with_index do |t, i|
    s << t.to_s
    s << "%8.3f%s" % [((t.elapsed) / total_time * 100.0), '%'] if @@timer_list.count > 1
    if pair_comparison and (@@mode == :side_by_side) and (i == greater_index)
      s << ", %.1f times faster." % speed_multiple
    end
    s << "\n"
  end
  if !(@@mode == :side_by_side and pair_comparison) and @@timer_list.count > 1
    total_whole_digits = digits(total_time.to_i)
    digit_overflow = total_whole_digits - @@max_whole_digits
    leading_spaces = (@@max_name_length + 2) - digit_overflow

    s << (" " * (@@max_name_length + 2))
    s << ("-" * (DIGITS_OF_PRESCISION + @@max_whole_digits + 2))
    s << "\n"
    s << (" " * leading_spaces) if leading_spaces > 0
    s << "%#{DIGITS_OF_PRESCISION + total_whole_digits + 1}.#{DIGITS_OF_PRESCISION}fs" % total_time
    s << "\n"
  end
  s
end

Instance Method Details

#+(o) ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 102

def +(o)
  o = o.elapsed if o.is_a?(self.class)
  @elapsed += o
  update_digit_count
end

#/(o) ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 107

def /(o)
  o = o.elapsed if o.is_a?(self.class)
  @elapsed /= o
  update_digit_count
end

#clear ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 82

def clear
  @state = :stopped
  @time = []
  @elapsed = 0.0
end

#digits(n) ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 92

def digits(n)
  self.class.digits(n)
end

#start ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 112

def start
  if @state == :stopped
    @state = :running
    @start = Time.now
  end
end

#stop ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 118

def stop
  if @state == :running
    stop = Time.now
    @elapsed += (stop - @start)
    update_digit_count
    @state = :stopped
  end
end

#to_s ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 99

def to_s
   "% #{@@max_name_length}s: %#{DIGITS_OF_PRESCISION + @@max_whole_digits + 1}.#{DIGITS_OF_PRESCISION}fs" % [@name, @elapsed]
end

#update_digit_count ⇒ Object 



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# File 'lib/gem_with_extension_example/timer.rb', line 95

def update_digit_count
  whole_digits = digits(@elapsed.to_i)
  @@max_whole_digits = whole_digits if whole_digits > @@max_whole_digits
end