- tie my %cache, 'DB_File', $cache, O_RDWR|O_CREAT, 0644 if $caching;
- memoize 'flacinfo', NORMALIZER => \&normalizer, LIST_CACHE => 'MERGE', SCALAR_CACHE => [HASH => \%cache] if $caching;
- memoize 'mp3info' , NORMALIZER => \&normalizer, LIST_CACHE => 'MERGE', SCALAR_CACHE => [HASH => \%cache] if $caching;
+ tie my %cache, 'DB_File', $cache, O_RDWR|O_CREAT, 0644 unless $cache eq '';
+ memoize 'flacinfo', NORMALIZER => \&normalizer, LIST_CACHE => 'MERGE', SCALAR_CACHE => [HASH => \%cache] unless $cache eq '';
+ memoize 'mp3info' , NORMALIZER => \&normalizer, LIST_CACHE => 'MERGE', SCALAR_CACHE => [HASH => \%cache] unless $cache eq '';