From: Kikutani Makoto <kikutani@...>
Date: 1998-10-25T08:38:04+09:00
Subject: [ruby-list:10324] Re: Speed!


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えぐちさん、わたなべさん、まつもとさんの助言を加えて、
最終的に添付の形にしました。

----- ruby 1.1c6
% time ruby floatBasic_ruby
Elements = 100000, average = 14.499995
ruby floatBasic_ruby  6.41s user 0.52s system 99% cpu 6.937 total
----- perl 5.004_04
% time perl floatBasic_perl
Elements = 100000, average = 14.499995
perl floatBasic_perl  6.71s user 0.06s system 85% cpu 7.929 total
----- tcl 8.0
% time tclsh8.0 floatBasic_tcl
Elements = 100000, average = 14.499995
tclsh8.0 floatBasic_tcl  54.90s user 0.15s system 96% cpu 57.089 total
----- python 1.5.1
% time python floatBasic_python
Elements = 100000 average = 14.499995
python floatBasic_python  58.30s user 0.15s system 98% cpu 59.137 total

というわけで、perlに勝てるくらいになってしまいました。
tclは前のは7.6だったので、8.0にしたら少し速くなった。

Pythonで何とか書いたのでpython-ml-jpに結果を送ったのだけど
なんか届いてないな。アドレス変更後のに送ったのに。
道場破りってか、これはあまりにPythonの書き方が悪いせいだろうから、
直してもらおうと思ったのに。
興味ないかもしれないけどこれも付けときます。

-- 
人生を背負い投げ

菊谷 誠(Kikutani Makoto)  kikutani@sprintmail.com

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Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=floatBasic_ruby

GC.disable
row = nil
col_num = 0
row_ave = []
col_sum = []
rsum = 0.0
r = 0.0
f = File.open('floatData')
while f.gets
  row = split("\t")
  if col_num == 0
    col_num = row.size
    col_sum.fill(0.0, 0..col_num-1)
  end
  rsum = 0.0
  0.upto(col_num - 1) do |i|
    r = row[i].to_f
    rsum += r
    col_sum[i] += r 
  end
  row_ave << rsum / col_num
end
row_num = row_ave.size
col_ave = []
total = 0.0
col_sum.each{|c|
  col_ave << c / row_num
  total += c
}
data_num = row_num * col_num
printf "Elements = %d, average = %f\n", data_num, total / data_num

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Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=floatBasic_python

import sys,string
col_num = 0
row_num = 0
row_ave = []
for line in open("floatData", 'r').readlines():
    row = string.split(line)
    if col_num == 0:
	col_num = len(row)
	col_sum = [0.0] * col_num
	for i in range(col_num):
	    col_sum[i] = 0.0
    rsum = 0.0
    for i in range(len(row)):
	r = string.atof( row[i] )
	rsum = rsum + r
	col_sum[i] = col_sum[i] + r
    row_ave = row_ave + [rsum / col_num]
    row_num = row_num + 1
total = 0.0
col_ave = []
for i in range(col_num):
    c = col_sum[i]
    col_ave = col_ave + [c / row_num]
    total = total + c
data_num = row_num * col_num
sys.stdout.write("Elements = %d " % data_num + 
            "average = %f\n" % (total / data_num) + "\n")

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