On Aug 5, 2014, at 4:18 PM, Olivier Mengué <olivier.men...@gmail.com> wrote:

> Here is below the output (latest releases of DateTime, DateTime::Locale, 
> DateTime::TimeZone on perl 5.20.0).
> DateTime::Locale::Catalog is the module that contains all the locales names.
> David, is it that module that you worry about or have you found something 
> worse?

I think the overhead comes in the DateTime::Locale::_register() function, which 
is called once for each locale returned by DateTime::Locale::Catalog. I would 
not think any locales would be loaded until they were needed.

Best,

David

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