From: Urabe Shyouhei <shyouhei@...>
Date: 2014-01-05T20:11:16+09:00
Subject: [ruby-core:59558] Re: [ruby-trunk - Feature #9362][Assigned] Minimize cache misshit to gain optimal speed

On 01/05/2014 12:45 PM, Eric Wong wrote:
>       This fixes exploding of recursive hashes, as inserting the hash into
>       itself would trigger an explode and lead to a corrupted hash and
>       wasted memory.

Ah, explode() -> st_insert() -> Hash#hash -> explode() path.  I wasn't
aware of this.  Thank you.