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 64bit performance vs 32bit
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petripiirainen

Finland
9 Posts

Posted - Jan 12 2023 :  05:22:05  Show Profile  Reply
Have you noticed that 64bit Delphi applications (Delphi 11) are running slower than 32bit versions. It seems that if there is a lot of calculations (like blending modes etc) 64 bit applications are running 5-10% slower than 32bit version.

Here is a sample command line application with Imageen v11.4.5 and running time results (antivirus disabled)


ImageEnView1 := TImageEnView.Create(nil);
ImageEnView1.IO.LoadFromFile('E:\Testing\performance\out.bmp');
imageenview1.LayersAdd(ielkimage,0,0);
imageenview1.LayersAdd(ielkimage,0,0);
imageenview1.Layers[1].Assign(imageenview1.Layers[0]);
imageenview1.Layers[2].Assign(imageenview1.Layers[0]);
imageenview1.LayersCurrent := 2;
imageenview1.Proc.Negative;
imageenview1.Layers[1].Operation := ielOverlay;
imageenview1.LayersMergeAll();
ImageEnView1.IO.savetofile('E:\Testing\performance\out2.bmp');


Results:

PowerShell measure-command:

1000x668 pixels pixels BMP image (out.bmp)

32bit
TotalMilliseconds : 61.3192

64bit
TotalMilliseconds : 65.6645

6246x4170 pixels BMP image (out.bmp)

32bit
TotalMilliseconds : 819.6748

64bit
TotalMilliseconds : 911.3409



If I disable all "layers code", just load and save bitmap then results are same:

32bit:
TotalMilliseconds : 99.1932
64bit:
TotalMilliseconds : 101.8792



Is this 64bit Delphi compiler issue?

xequte

37479 Posts

Posted - Jan 12 2023 :  14:26:26  Show Profile  Reply
Hi

I'm not seeing that here (Delphi 11 on Windows 11). I'm seeing both as quite similar with 64bit being slightly faster.

Are you running under the debugger?

Nigel
Xequte Software
www.imageen.com
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petripiirainen

Finland
9 Posts

Posted - Jan 12 2023 :  23:43:01  Show Profile  Reply
I am running release versions.

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