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bug#15405: 24.3; #[] freezes emacs

From: Dmitry Antipov
Subject: bug#15405: 24.3; #[] freezes emacs
Date: Sat, 21 Sep 2013 05:28:58 +0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0

On 09/21/2013 01:38 AM, Barry OReilly wrote:

If performance didn't motivate making a global zero_vector, what did?

1) Small memory saving, like with empty strings.
2) Simple implementation - (eq [] []) is trivial.

BTW, I have no ideas who and why produces empty bytecode strings.
Shouldn't it be disallowed/optimized away? IIUC this is the
only PVEC_xxx type which can be zero-sized.


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