From: KOSAKI Motohiro <kosaki.motohiro@...>
Date: 2015-11-04T22:00:12-05:00
Subject: [ruby-core:71343] Re: [Ruby trunk - Feature #8976] file-scope freeze_string directive

> Shugo Maeda wrote:
>
>> It's not just for compatibility.
>>
>> The original problem was that a new String object has to be allocated by a string literal
>> for each evaluation.  So I don't understand the reason why a dynamic string literal should
>> be frozen in spite of the fact freezing dynamic strings can't reduce object allocation.
>
> It is not a big problem.
> We can reduce extra object allocation with "foo#{exp}bar".dup using an optimization similar for "foo".freeze.
>
> I think the pragma and option name should explain the behavior.
> The name is "frozen-string-literal".
> So, basically, all string literal should return a frozen object.
>
> We need an explanation if we introduce an exception.

+1

Current explanation is too weak to make an exception, I think.