Class: CompSci::Timer

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

Constant Summary collapse

SECS_PER_MIN = 
60
MINS_PER_HOUR = 
60
SECS_PER_HOUR = 
SECS_PER_MIN * MINS_PER_HOUR

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.elapsed(&work) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 22

def self.elapsed(&work)
  t = self.now
  return yield, self.since(t)
end

.elapsed_display(elapsed_ms, show_us: false) ⇒ Object

HH::MM::SS.mmm.uuuuuuuu



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# File 'lib/compsci/timer.rb', line 46

def self.elapsed_display(elapsed_ms, show_us: false)
  elapsed_s, ms = elapsed_ms.divmod 1000
  ms_only, ms_fraction = ms.round(8).divmod 1

  h = elapsed_s / SECS_PER_HOUR
  elapsed_s -= h * SECS_PER_HOUR
  m, s = elapsed_s.divmod SECS_PER_MIN

  hmsms = [[h, m, s].map { |i| i.to_s.rjust(2, '0') }.join(':'),
           ms_only.to_s.rjust(3, '0')]
  hmsms << (ms_fraction * 10 ** 8).round.to_s.ljust(8, '0') if show_us
  hmsms.join('.')
end

.loop_avg(count: 999, seconds: 1, &work) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 27

def self.loop_avg(count: 999, seconds: 1, &work)
  i = 0
  start = self.now
  val = nil
  loop {
    val = yield
    i += 1
    break if i >= count
    break if self.since(start) > seconds
  }
  return val, self.since(start) / i.to_f
end

.now ⇒ Object 



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# File 'lib/compsci/timer.rb', line 9

def self.now
  Process.clock_gettime Process::CLOCK_MONOTONIC
end

.since(t) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 18

def self.since(t)
  self.now - t
end

.timestamp(t) ⇒ Object

YYYY-MM-DD HH::MM::SS.mmm



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# File 'lib/compsci/timer.rb', line 41

def self.timestamp(t)
  t.strftime "%Y-%m-%d %H:%M:%S.%L"
end

Instance Method Details

#elapsed(t = Time.now) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 74

def elapsed(t = Time.now)
  t - @start
end

#elapsed_display(t = Time.now) ⇒ Object Also known as: to_s, inspect 



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

def elapsed_display(t = Time.now)
  self.class.elapsed_display(elapsed_ms(t))
end

#elapsed_ms(t = Time.now) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 78

def elapsed_ms(t = Time.now)
  elapsed(t) * 1000
end

#restart(t = Time.now) ⇒ Object Also known as: initialize 



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# File 'lib/compsci/timer.rb', line 60

def restart(t = Time.now)
  @start = t
  self
end

#stamp(msg = '', t = Time.now) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 88

def stamp(msg = '', t = Time.now)
  format("%s %s", elapsed_display(t), msg)
end

#stamp!(msg = '', t = Time.now) ⇒ Object 



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

def stamp!(msg = '', t = Time.now)
  puts stamp(msg, t)
end

#timestamp(t = Time.now) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 66

def timestamp(t = Time.now)
  self.class.timestamp t
end

#timestamp!(t = Time.now) ⇒ Object 



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# File 'lib/compsci/timer.rb', line 70

def timestamp!(t = Time.now)
  puts '-' * 70, timestamp(t), '-' * 70
end