Files
rails/activesupport/lib/active_support/values
Tim Lucas 2147f35df2 Make sure require_tzinfo only calls Kernel#require if TZInfo isn't already present.
This wasn't a problem when require_tzinfo was only called from TimeZone#initialize, but now it's being called for every lookup to TimeZone.[] (via lazy_zones_map)

TimeZone lookup can occur when unmarshalling TimeWithZone objects, which is where I first saw the big slowdown (500ms for each Rails action that loaded from Rails.cache)
2011-09-07 14:21:18 +03:00
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