From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: GNAT: Performance of String functions
Date: 1997/07/23
Date: 1997-07-23T00:00:00+00:00 [thread overview]
Message-ID: <dewar.869632950@merv> (raw)
In-Reply-To: 33D4F30F.5299@online.no
Tarjei said
<<That would mean that the implementation supply a default maximum size.
If the implementation should be more effective than the usual bounded
string implementation the compiler whould have to know what the real
length of a string is for assignments. Otherwise the code generated
spends a lot of time copying junk data.
A "smart" compiler is paramount since we cannot do anything about the
assignment operator in Ada. We can write a custom procedure or function
to handle assignment, but it is not the same as ":=".
>>
You are still making unwarranted assumptions about the data structure
used for bounded strings. If the data structure is what you call a
"counted
" string, then no special cleverness is required on the compiler's part.
next prev parent reply other threads:[~1997-07-23 0:00 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-07-18 0:00 GNAT: Performance of String functions Jakob Heinemann
1997-07-18 0:00 ` Robert Dewar
1997-07-19 0:00 ` Tarjei T. Jensen
1997-07-19 0:00 ` Matthew Heaney
1997-07-20 0:00 ` Robert Dewar
1997-07-20 0:00 ` Tarjei T. Jensen
1997-07-20 0:00 ` Robert Dewar
1997-07-21 0:00 ` Tucker Taft
1997-07-21 0:00 ` Tarjei Jensen
1997-07-21 0:00 ` Matthew Heaney
1997-07-22 0:00 ` Robert Dewar
1997-07-22 0:00 ` Tarjei Jensen
1997-07-22 0:00 ` Larry Kilgallen
1997-07-22 0:00 ` Tarjei T. Jensen
1997-07-23 0:00 ` Robert Dewar [this message]
1997-07-23 0:00 ` Tarjei Jensen
1997-07-23 0:00 ` Samuel Mize
1997-07-23 0:00 ` W. Wesley Groleau x4923
1997-07-24 0:00 ` Robert A Duff
1997-07-24 0:00 ` Mats Weber
1997-07-24 0:00 ` Tarjei Jensen
1997-07-24 0:00 ` Matthew Heaney
1997-07-24 0:00 ` Robert Dewar
1997-07-24 0:00 ` Robert Dewar
1997-07-28 0:00 ` Mats Weber
1997-07-28 0:00 ` Matthew Heaney
1997-07-29 0:00 ` Robert Dewar
1997-07-28 0:00 ` Robert Dewar
1997-07-28 0:00 ` Robert Dewar
1997-07-24 0:00 ` Matthew Heaney
1997-07-23 0:00 ` Larry Kilgallen
1997-07-22 0:00 ` Robert Dewar
1997-07-21 0:00 ` Robert Dewar
1997-07-20 0:00 ` Tarjei T. Jensen
1997-07-22 0:00 ` Jakob Heinemann
1997-07-23 0:00 ` Robert Dewar
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