[iOS] improve favorite performance · DroidKaigi/conference-app-2023@93c1834

Header comments should be consistent with project patterns (file_header)

Variable name 's' should be between 2 and 40 characters long (identifier_name)

Variable name 'm' should be between 2 and 40 characters long (identifier_name)

Variable name 'l' should be between 2 and 40 characters long (identifier_name)

Variable name 's' should be between 2 and 40 characters long (identifier_name)

Variable name 'm' should be between 2 and 40 characters long (identifier_name)

Variable name 'l' should be between 2 and 40 characters long (identifier_name)

Variable name 's' should be between 2 and 40 characters long (identifier_name)

Variable name 'm' should be between 2 and 40 characters long (identifier_name)

Variable name 'l' should be between 2 and 40 characters long (identifier_name)

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