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Store requested detail indexes in hashes

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This improves the performance of matching and sorting TemplateDetails
based on Hash#[] being faster than Array#include? and Array#index.
This commit is contained in:
John Hawthorn 2021-05-12 16:31:16 -07:00
parent a8a54a1821
commit eac19fea2b
1 changed files with 27 additions and 28 deletions
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55
actionview/lib/action_view/template_details.rb
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@ -4,13 +4,30 @@ module ActionView
class TemplateDetails # :nodoc:
class Requested
attr_reader :locale, :handlers, :formats, :variants
attr_reader :locale_idx, :handlers_idx, :formats_idx, :variants_idx
ANY_HASH = Hash.new(1).merge(nil => 0).freeze
def initialize(locale:, handlers:, formats:, variants:)
@locale = locale
@handlers = handlers
@formats = formats
@variants = variants
@locale_idx = build_idx_hash(locale)
@handlers_idx = build_idx_hash(handlers)
@formats_idx = build_idx_hash(formats)
if variants == :any
@variants_idx = ANY_HASH
else
@variants_idx = build_idx_hash(variants)
end
end
private
def build_idx_hash(arr)
[*arr, nil].each_with_index.to_h.freeze
end
end
attr_reader :locale, :handler, :format, :variant
@ -23,28 +40,19 @@ module ActionView
end
def matches?(requested)
return if format && !requested.formats.include?(format)
return if locale && !requested.locale.include?(locale)
unless requested.variants == :any
return if variant && !requested.variants.include?(variant)
end
return if handler && !requested.handlers.include?(handler)
true
requested.formats_idx[@format] &&
requested.locale_idx[@locale] &&
requested.variants_idx[@variant] &&
requested.handlers_idx[@handler]
end
def sort_key_for(requested)
locale_match = details_match_sort_key(locale, requested.locale)
format_match = details_match_sort_key(format, requested.formats)
variant_match =
if requested.variants == :any
variant ? 1 : 0
else
details_match_sort_key(variant, requested.variants)
end
handler_match = details_match_sort_key(handler, requested.handlers)
[locale_match, format_match, variant_match, handler_match]
[
requested.formats_idx[@format],
requested.locale_idx[@locale],
requested.variants_idx[@variant],
requested.handlers_idx[@handler]
]
end
def handler_class
@ -54,14 +62,5 @@ module ActionView
def format_or_default
format || handler_class.try(:default_format)
end
private
def details_match_sort_key(have, want)
if have
want.index(have)
else
want.size
end
end
end
end