From: Daniel Schnell <daniel.schnell@...>
Date: 2002-11-08T23:12:00+09:00
Subject: File::read Performance

Hi there,

if I make the following implementation of the command "cp" with ruby, the
read Performance is really bad. Can I improve it in any way ?


Thx in advance,

Daniel.


#
# copies source to destionation
#
def cp(source, dest)
    Dir[source].each {|f|
        if (File.directory?(dest)) then
            outfilename=dest+"/"+File.basename(f)
        else
            outfilename=dest
        end
        puts outfilename

        inF = File.new(f, "r") #p rescue "ERROR: #$!"
        if (!inF) then
            printf("%s: Could not open output file %s, maybe insufficient
rights ?\n", PROGRAM_NAME, f)
            inF.close()
            next
        end

        outF = File.new(outfilename, "w+")
        if (!outF) then
            printf("%s: Could not open output file %s, maybe insufficient
rights ?\n", PROGRAM_NAME, outfilename)
            inF.close()
            next
        end

        # now read
        outF.binmode
        inF.binmode
        while (! inF.eof() )
            outF << inF.read(8192)
        end
        outF.close()
        inF.close()
        }
end