From: Damjan Rems <d_rems@...>
Date: 2009-03-27T22:34:59+09:00
Subject: Bug: Ruby 1.9.1 File io on Windows is slooooow


This simple code shows everything:

time = [Time.new]
c = ''
'aaaa'.upto('zzzz') {|e| c << e}
3.times { c << c }
time << Time.new
File.open('out.file','w') { |f| f.write(c) }
time << Time.new
c = File.open('out.file','r') { |f| f.read }
time << Time.new
0.upto(time.size - 2) {|i| p "#{i} #{time[i+1]-time[i]}" }

ruby 1.9.1p0 (2009-01-30 revision 21907) [i386-mswin32]
"0 0.537075"
"1 0.696244"
"2 40.188834"

ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
"0 0.551"
"1 0.133"
"2 0.087"

That is about 5x slower write and 500x read operation. Times are the
same if I do:
f = File.new('out.file','r')
c = f.read
f.close

Tried on two machines. Vista SP1 and XP SP3. Same results.


by
TheR


P.S.
Where can I officaly report a Ruby bug?
-- 
Posted via http://www.ruby-forum.com/.