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What algorithm is used for files compression?
Well-known ZIP (Deflate) algorithm.
How much is file size decreased by?
It depends from your files, but roughly, exe-files are decreased by 30-40% and dll-files by 50-70%.
Some file formats (JPG, PNG, and the like) already contain
compressed data. How to avoid second compression? You can specify an appropriate compression threshold. If the file cannot be significantly decreased in size, it won't be packed.
Does compression slow down the packed program?
Generally, no. Moreover, since your data files form a single file, the access to this file is accelerated, and this compensates possible decompression lags.
I have packed a 64 KB executable, and it has even increased in size. What's wrong?
Everything is right. MoleBox adds a small (about 40 KB) launcher module to the packed application. This launcher handles all file reading operations.