Ruby » Backport187

Backport #2741

Updated by jeremyevans0 (Jeremy Evans) over 5 years ago

=begin 
  
  Reposting from a different bug report... 
 
  # 10 MB 
  n = 100 * 1000 * 1000 
  puts "writing" 
  File.open("foo", 'wb'){|f| f.write(" " * n) } 
  puts "reading" 
  File.open("foo", 'rb') do |io| 
    io.gets 
  end 
 
  writing the file takes 1s, reading it takes 2000s, as it reads (in windows) in only in 4K bytes, so it is constantly resizing the string and recopying it.    In Linux it has the same problem, but reads in 64K bytes, so the problem is much less. 
 
 =end 
 

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