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class Perf
def initialize
@items = []
end
def add(title, op, &blk)
@items << Item.new(title, op, &blk)
end
def before(title, &blk)
@items.each do |i|
if title == i.title
i.set_before(&blk)
break
end
end
end
def run(iter)
base = Item.new(nil, nil) { }
base.run(iter, 0.0)
@items.each do |i|
i.run(iter, base.duration)
if i.error.nil?
puts format("#{i.title}.#{i.op} #{iter} times in %0.3f seconds or %0.3f #{i.op}/sec.", i.duration,
iter / i.duration)
else
puts "***** #{i.title}.#{i.op} failed! #{i.error}"
end
end
summary
end
def summary
width = 6
@items.each do |i|
next if i.duration.nil?
width = i.title.size if width < i.title.size
end
iva = @items.clone
iva.delete_if { |i| i.duration.nil? }
iva = iva.sort_by { |i| i.duration }
puts
puts 'Summary:'
puts format('%*s time (secs) rate (ops/sec)', width, 'System')
puts "#{'-' * width} ----------- --------------"
iva.each do |i|
if i.duration.nil?
else
puts format('%*s %11.3f %14.3f', width, i.title, i.duration, i.rate)
end
end
puts
puts "Comparison Matrix\n(performance factor, 2.0 means row is twice as fast as column)"
puts(([' ' * width] + iva.map { |i| format('%*s', width, i.title) }).join(' '))
puts((['-' * width] + iva.map { |i| '-' * width }).join(' '))
iva.each do |i|
line = [format('%*s', width, i.title)]
iva.each do |o|
line << format('%*.2f', width, o.duration / i.duration)
end
puts line.join(' ')
end
puts
end
class Item
attr_accessor :title
attr_accessor :op
attr_accessor :blk
attr_accessor :duration
attr_accessor :rate
attr_accessor :error
def initialize(title, op, &blk)
@title = title
@blk = blk
@op = op
@duration = nil
@rate = nil
@error = nil
@before = nil
end
def set_before(&blk)
@before = blk
end
def run(iter, base)
GC.start
@before.call unless @before.nil?
start = Time.now
iter.times { @blk.call }
@duration = Time.now - start - base
@duration = 0.0 if @duration < 0.0
@rate = iter / @duration
rescue Exception => e
@error = "#{e.class}: #{e.message}"
end
end # Item
end # Perf
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