On Mon, 27 Sep 2010, Igor Stasenko wrote:
On 27 September 2010 22:10, Levente Uzonyi <[email protected]> wrote:
On Mon, 27 Sep 2010, Johan Brichau wrote:
On 27 Sep 2010, at 14:37, Schwab,Wilhelm K wrote:
"Works fine" is a value judgment that can cut both ways: one could also
argue that VW lacks a useful optimization of literals. Non-literal strings
should do what you want.
I wonder how useful the optimization is, actually.
Probably not many (if any) methods will use the same literal multiple
times and count on the compiler to optimize them into the same literal.
I think this is from the 80's or 90's where this could save some memory.
According to my calculations in Squeak 4.2 with some extra packages loaded
it saves at least 36591 bytes (object size + 1 slot in the literal array),
which is only 0.79 bytes / method.
Well, you can save a bit more, if you scan a whole image literals and
unify them.
This could be userful for tidying up the image size.
Probably yes, but that's not the point I guess. I just wanted to show that
the current method doesn't really save much. Unifying the literals in the
image is dangerous, because literal strings are not immutable (and they
shouldn't be IMHO). So that could lead to random errors if a method is
modifying a shared string literal.
Levente
Levente
Inversely, I have never run into that issue myself either, until I was
just testing those little snippets for the students. Or... at least, I think
I never have :-)
Johan
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--
Best regards,
Igor Stasenko AKA sig.
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