Very slow ZIP compression about nanazip

[clankgeek]

I think it's not a bug but rather a compression level that needs to be adjusted to improve performance on ZIP compression.

On Linux, referring to the ZIP man page, I can use different compression levels ranging from 1 (very fast) to 9 (very slow but best compression).

zip --help
  -1   compress faster              -9   compress better

Perhaps in the ZIP library, you can override the compression level ? or add the chose of level directly in gui parameter :)