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Memoization on dir contents_signature

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Leeingnyo
2021-09-12 02:03:54 +09:00
parent a8f729f5c1
commit 9309f51df6
2 changed files with 9 additions and 5 deletions
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src/library/title.cr
+4 -3
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@@ -70,11 +70,12 @@ class Title
end
end
def examine : Bool
def examine(cache = {} of String => String) : Bool
return false unless Dir.exists? @dir # no title, should be removed
contents_signature = Dir.contents_signature @dir
contents_signature = Dir.contents_signature @dir, cache
# not changed, preserve
return true if @contents_signature == contents_signature
puts "Contents changed in #{@dir}"
# fix title
@contents_signature = contents_signature
@@ -95,7 +96,7 @@ class Title
previous_titles_size = @title_ids.size
@title_ids.select! do |title_id|
title = Library.default.get_title! title_id
title.examine
title.examine cache
end
remained_title_dirs = @title_ids.map do |id|
title = Library.default.get_title! id