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Old 15th August 2003, 10:07   #2
[NSIS Dev, Mod]
kichik's Avatar
Join Date: Oct 2001
Location: Israel
Posts: 11,343
CRC is always good to have. It makes sure your installer is not damaged (bad internet connection, virus, defected hd or simply edited installer).

As for the compression, it's up to you. As the docs say:

ZLib (the default) uses deflate compression. This mode uses less memory at runtime and is faster. BZip2 compression is usually better for large installers, but it is slower and uses a lot more memory at runtime.

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