pozo
9th February 2004 21:10 UTC

7z compression level?
Hi,

using 7-zip from 7.zip.org you have 5 compression levels : store, fast, normal, maximum and ultra. Which one does NSIS use? Is it possible to set the compression level?

Thanks,
Ingo

nandhp
9th February 2004 21:14 UTC

It doesn't use 7-zip, nor does it rate compression quality that way.

Read about SetCompresser in the documentation for information on the various compressers.

Joost Verburg
9th February 2004 21:21 UTC

NSIS 2.0 supports LZMA compression, which is the main 7-zip method.

These 7-zip settings are actually settings for the dictionary size, see SetCompressorDictSize in the NSIS Users Manual.

The default (8 MB) is usually a good setting. Note that a higher dictionary size also increases memory requirements when decompressing.

pozo
9th February 2004 21:36 UTC

Does anyone know how good NSIS LZMA compression is compared to 7-zip LZMA?

Vytautas
9th February 2004 22:17 UTC

It would be the same provided that you use the same dictionary size.

Vytautas

pozo
10th February 2004 01:01 UTC

works perfect! thanks