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4.1.4.6 Compression
We can make a file smaller by compressing it (unless it is already compressed, then it gets larger)
File compression can make files harder to use in Web documents, but the smaller size makes them faster to download. A good rule of thumb is that when the file is MB is size, compression will have a large impact.
Many file formats have compression built in, including,
Typical compression formats include,
Some files, such as text, will become 1/10 of their original size.
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