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Improve cache size check to be more performant

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Summing the sizes of each cached file every time is very inefficient.
Instead we can simply store the cache size in an constant and increase
it everytime a file is added into the cache.
This commit is contained in:
syeopite
2025-06-03 17:10:10 -07:00
committed by Émilien (perso)
parent 7f9cfe1aa2
commit 21049518d6
2 changed files with 35 additions and 3 deletions
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7
src/invidious/http_server/static_assets_handler.cr
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@@ -20,6 +20,7 @@ module Invidious::HttpServer
end
CACHE_LIMIT = 5_000_000 # 5MB
@@current_cache_size = 0
@@cached_files = {} of Path => CachedFile
# Returns metadata for the requested file
@@ -71,9 +72,8 @@ module Invidious::HttpServer
# Writes file data to the cache
private def flush_io_to_cache(io, file_path, file_info)
if @@cached_files.sum(&.[1].size) + file_info.size < CACHE_LIMIT
data_slice = io.to_slice
@@cached_files[file_path] = CachedFile.new(data_slice, file_info.size, file_info.modification_time)
if (@@current_cache_size += file_info.size) <= CACHE_LIMIT
@@cached_files[file_path] = CachedFile.new(io.to_slice, file_info.size, file_info.modification_time)
end
end
@@ -112,6 +112,7 @@ module Invidious::HttpServer
#
# This is only used in the specs to clear the cache before each handler test
def self.clear_cache
@@current_cache_size = 0
return @@cached_files.clear
end
end