[Mono-bugs] [Bug 342190] New: [Performance] MS.NET 2.0 is twice faster as mono 1.2. 6 when compressing with SharpZipLib

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=342190

           Summary: [Performance] MS.NET 2.0 is twice faster as mono 1.2.6
                    when compressing with SharpZipLib
           Product: Mono: Runtime
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at ximian.com
        ReportedBy: informatique.internet at fiducial.fr
         QAContact: mono-bugs at ximian.com
          Found By: ---


Try this program :

public static void  TestSharpZip()
                {
                        DateTime debut=DateTime.Now;
                        FileStream
fs=File.Open("/tmp/logquota.test",FileMode.Open);
                        GZipOutputStream gzoutput=new
GZipOutputStream(File.Create("logquotasharpzip.gz"));
                        gzoutput.SetLevel(5);
                        byte[] buffer=new byte[8191];
                        int len;
                        do{
                                len=fs.Read(buffer,0,buffer.Length);
                                if (len>0)
                                        gzoutput.Write(buffer,0,len);
                        }while (len!=0);
                        gzoutput.Close();
                        fs.Close();
                        DateTime fin=DateTime.Now;
                        TimeSpan dure=fin-debut;
                        Console.WriteLine(dure);
                }

Where /tmp/logquota.test is a ~150Mb text file

On MS.NET 2.0 it takes about 7s to compress the file (it takes about the same
on .NET 1.1)
On Mono 1.2.6 it takes about 16s to compress the file on the same machine

The difference is too big to ignore it...

I think it's important to keep an eye on performance... 

Thanks for tracking this problem


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