ruby 几个版本的 CPU-bound 实际测试统计
28 Oct 2016ruby代码：
- 为了适用于 ree-1.8.7， 这里没有选择 1.9.3 及之后版本标准库的
prime, 因为那样速度会更快，比较的统计结果会没有意义
require 'benchmark'
def prime_sieve_upto(n)
all_nums = (0..n).to_a
all_nums[0] = all_nums[1] = nil
all_nums.each do |p|
#jump over nils
next unless p
#stop if we're too high already
break if p * p > n
#kill all multiples of this number
(p*p).step(n, p){ |m| all_nums[m] = nil }
end
#remove unwanted nils
all_nums.compact
end
primes = 1_000_000
iterations = 10
num_threads = 5
iterations_per_thread = iterations / num_threads
Benchmark.bm(15) do |x|
x.report('single-threaded') do
iterations.times do
prime_sieve_upto(primes)
end
end
x.report('multi-threaded') do
num_threads.times.map do
Thread.new do
iterations_per_thread.times do
prime_sieve_upto(primes)
end
end
end.each(&:join)
end
end
以下为统计输出结果：
ree-1.8.7-2012.02
user system total real
single-threaded 5.660000 0.060000 5.720000 ( 5.725174)
multi-threaded 6.110000 0.110000 6.220000 ( 6.228208)
MRI ruby 1.9.3-p551
user system total real
single-threaded 3.450000 0.060000 3.510000 ( 3.531772)
multi-threaded 3.660000 0.080000 3.740000 ( 3.760532)
MRI ruby 2.0.0-p598
user system total real
single-threaded 3.630000 0.080000 3.710000 ( 3.726324)
multi-threaded 3.680000 0.090000 3.770000 ( 3.808694)
MRI ruby 2.0.0-p648
user system total real
single-threaded 3.210000 0.060000 3.270000 ( 3.276048)
multi-threaded 3.330000 0.080000 3.410000 ( 3.402474)
MRI ruby 2.1.0
user system total real
single-threaded 2.360000 0.070000 2.430000 ( 2.422242)
multi-threaded 2.390000 0.070000 2.460000 ( 2.462325)
MRI ruby 2.2.3：
user system total real
single-threaded 2.300000 0.070000 2.370000 ( 2.361750)
multi-threaded 2.410000 0.080000 2.490000 ( 2.482332)
jruby-9.0.4.0：
user system total real
single-threaded 7.740000 0.280000 8.020000 ( 2.676519)
multi-threaded 11.760000 0.230000 11.990000 ( 3.064823)