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From: =?ISO-8859-1?Q?Hibou57_=28Yannick_Duch=EAne=29?=
 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Performance of access type : a tiny mistake in the WikiBook ?
Date: Wed, 7 Oct 2009 13:59:46 -0700 (PDT)
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Date: 2009-10-07T13:59:46-07:00
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Hi folks,

I was looking at the WikiBook, the section about access types.

I do not know it is a tiny mistake or something I did not understood.

http://en.wikibooks.org/wiki/Ada_Programming/Types/access

In one place, it is said =93 Depending on the implementation an access
might also render better performance than access all. =94 which match
what I had believed for long, but later, there is a list of best to
worst performance comparing access techniques :

=93
1) "in" modifier : parameter is passed into the subprogram.
2) "out" modifier : parameter is passed from the subprogram.
3) "in out" modifier : parameter may be modified by the subprogram.
4) access all : access to any (aliased) object.
5) pool access : the access is always within a storage pool and only
checks for not null are performed upon dereference.
6) anonymous access : complex "stack deeps level" checks are needed so
an "anonymous access" can be safely converted from and to an "access
all" or "pool access".
 =94
Pool Access is quoted after Access All, at position 5

Just a detail, but I wonder