bucket_info

Return a flat list summarising the hash’s bucket layout.

Synopsis

my ($keys, $buckets, $used, @length_counts) = bucket_info(%hash);

The first three values are the number of keys, the total bucket count, and the number of used buckets. Each $length_counts[$n] that follows is the number of buckets holding exactly $n keys, so $length_counts[0] is the empty-bucket count, $length_counts[1] the count of single-key buckets, and so on.

Returns the empty list for a non-hash argument or a magical hash. When the hash’s bucket array has not been allocated yet, only the three leading values are returned.