Class: Fropy::Benchmark

Inherits:
Object
  • Object
show all
Defined in:
lib/fropy/benchmark.rb

Instance Method Summary collapse

Constructor Details

#initialize(command, options) ⇒ Benchmark

Returns a new instance of Benchmark.



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# File 'lib/fropy/benchmark.rb', line 3

def initialize(command, options)
  @command = command
  @options = {
    poll_interval: 0.05,
    dev_null: false,
    log: true,
    verbose: false
  }.merge(options)
end

Instance Method Details

#measure ⇒ Object 



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# File 'lib/fropy/benchmark.rb', line 13

def measure
  log "Benchmarking #{@command}"
  log "Polling with interval of #{@options[:poll_interval]}s"
  log "Redirecting output to /dev/null" if @options[:dev_null]
  @max_memory = -1

  r_out, w_out = IO.pipe

  cmd = @command
  if @options[:dev_null]
    cmd << " > /dev/null"
  end

  @start_time = Time.now
  pid = Process.spawn cmd, out: w_out
  log "Spawned with pid: #{pid}"

  loop do
    status = Process.getpgid(pid) rescue nil
    break if status == nil
    current_memory = `ps -o rss= -p #{pid}`.to_i #kb
    puts "Using #{mem}kb" if @options[:verbose]
    @max_memory = current_memory if current_memory > @max_memory
    sleep @options[:poll_interval]
  end

  @end_time = Time.now
  @time = @end_time - @start_time

  w_out.close
  output = r_out.read
  r_out.close

  log "      Time: #{@time}s"
  log "Max Memory: #{@max_memory}"
end