From: Nikolai Weibull <now@...>
Date: 2010-03-06T02:25:02+09:00
Subject: [ruby-core:28515] Re: [Feature #905] Add String.new(fixnum) to 	preallocate large buffer

On Fri, Mar 5, 2010 at 17:25, Caleb Clausen <vikkous@gmail.com> wrote:
> On 3/5/10, Yusuke ENDOH <mame@tsg.ne.jp> wrote:
>> 2010/3/5 Kornelius Kalnbach <murphy@rubychan.de>:

>>> How big would the buffer size have to be for this template?
>>>
>>> ��<p><%= link_to @record.name, @record %></p>

>> Yes, it is generally difficult to determine the size.
>>
>> We may be able to estimate it by using domain knowledge in some cases.
>> (e.g., certain page size is empirically known as about 10KB, etc.)
>> But if the expectation is disappointed, it will cause wasteful memory
>> allocation or no speed up.

> Generally, a given template should expand to about the same size every
> time.

I���m getting the feeling thath the only real use case that we���ve got
for this so far is ERb.  Wouldn���t it make more sense to change the way
ERb (and similar ���string concatenators���) creates its result?