Different performance in api and in Application

[Stefan Menne]

I get different results in speed and compression ratio using the 7zip application and using the API's from C#.

I've compressed with LZMA a single 1.3 GB file and got:

7Zip File Manager V9.20
         Time:   10:47         File size:    54.646.561

SevenZipSharp.dll + 7z.dll(V9.20)
         Time:   32:13         File size:   104.450.490

LZMA SDK V9.22
         Time:   13:56         File size:    89.930.991

Any idea why there are so huge differences? Is it possible to achieve the performance of the Application also with an API?

[Igor Pavlov]

Maybe the dictionary size was larger.

[Stefan Menne]

Yes, thanks. When i set the dictionary size to 64MB i get the same file size.