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document updated a month ago, on May 23, 2022

How much space does it take to download large portions of CPAN?

All non-developer modules, only the latest version of each, packed

1.3gb, as of June 2011.

All modules, all versions, unpacked

66gb, as of June 2011.

You can get the latest size by using the stat.size part of MetaCPAN's API.