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The first time you assign a value to a new hash, it gets allocated 8 slots. When the number of slots used reaches 6 (which may be more than 6 keys if you get hash collisions), it expands to 16 slots. And it doubles again when 3/4s of the slots (12/16) are used. And so on.

You can see this if you run the following code:

perl -wE"my %h;$h{$_}=$_, say $_, ':',scalar %h for 1 .. 1025" | more 1:1/8 2:2/8 3:3/8 4:3/8 ## collision 5:4/8 6:5/8 7:6/8 8:7/16 9:8/16 10:9/16 11:10/16 12:10/16 ## collision 13:10/16 ## collision 14:11/16 15:11/16 ## collision 16:14/32 17:14/32 ## collision ...

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: Minimum Hash keys allocated? by BrowserUk
in thread Minimum Hash keys allocated? by flexvault

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