I read in a performance whitepaper that for v1 of .NET, jagged arrays (short[][]) can perform significantly better than 2D arrays (short[,]). They said that this disparity should be eliminated in a future release. Perhaps you should try it with a jagged array and see what happens...
> -----Original Message----- > From: dotnet discussion [mailto:[EMAIL PROTECTED]] > On Behalf Of Axel Heitland > Sent: Saturday, May 04, 2002 7:22 PM > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] Slow serialization > > > Some additional information. > > I'm using a binary formatter not a soap/xml formatter so > array optimization should be possible. > > Thinking this I tried to use a single dim array like > "short [] x = new short[512*512]" > and that gives very good results. > > Something about 4,5 ms per array, but a short[,] is > incredible slow (235 ms). > > > Is this just poorly optimized (will it be fixed?) or is there > a good reason for this significant slow down? > > Regards > Axel > > -----Original Message----- > From: Axel Heitland > Sent: Sonntag, 5. Mai 2002 01:52 > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] Slow serialization > > > Hmm - do you mean that serializing this > > [Serializable] > class MyImage > { > public short[,] x= new short[512,512]; > } > > results in serializing 256K shorts piece by piece? > > No array optimizations here? > > Looking at the SerializationInfo I can't find explicit array > support either. > > Well I simply cant't believe - if that's really the case then I'm > (badly) impressed. > > Regards > Axel > > -----Original Message----- > From: Shawn Wildermuth [mailto:[EMAIL PROTECTED]] > Sent: Samstag, 4. Mai 2002 23:55 > To: [EMAIL PROTECTED] > Subject: Re: [DOTNET] Slow serialization > > > I am impressed that it is marshaling it in 250ms. You have > up to 1/4 million shorts. I might make it faster if I wrote > the SerializationInfo prepended with the length of each of > these dimensions and only marshal what's required. But that > is just the first idea off the top of my head. > > Thanks, > > Shawn Wildermuth > [EMAIL PROTECTED] > > > -----Original Message----- > > From: dotnet discussion [mailto:[EMAIL PROTECTED]] > > On Behalf Of Axel Heitland > > Sent: Saturday, May 04, 2002 12:12 PM > > To: [EMAIL PROTECTED] > > Subject: [DOTNET] Slow serialization > > > > > > Hi all, > > > > I have a class that mainly contains a short[512,512] array and I'd > > like that class to be value marshalled via .net remoting. > > > > Unfortunately the serialization of such an element takes > about 250ms > > on my box - that's quite long isn't it?! > > > > Is there any way to tune the performance? I tried to implement > > ISerializable and used the SerializationInfo, but that > didn't result > > in better performance. > > > > Any pointer are highly appreciated. > > > > Regards > > Axel > > > > You can read messages from the DOTNET archive, unsubscribe from > > DOTNET, or subscribe to other DevelopMentor lists at > > http://discuss.develop.com. > > > > You can read messages from the DOTNET archive, unsubscribe > from DOTNET, or subscribe to other DevelopMentor lists at > http://discuss.develop.com. > > You can read messages from the > DOTNET archive, unsubscribe from DOTNET, or subscribe to > other DevelopMentor lists at http://discuss.develop.com. > > You can read messages from the DOTNET archive, unsubscribe > from DOTNET, or subscribe to other DevelopMentor lists at > http://discuss.develop.com. > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
