Arnulf,
it looks quite similar, thanks for the hint. Do you know if they did
some formal analysis of the performance?
Kay
Arnulf Wiedemann wrote:
Hi Kay,
here is what the scripting language Tcl does use for dynamic string handling:
/*
* The structure defined below is used to hold dynamic strings. The only
* field that clients should use is the string field, accessible via the
* macro DStringValue.
*/
#define DSTRING_STATIC_SIZE 200
typedef struct DString {
char *string; /* Points to beginning of string: either
* staticSpace below or a malloced array. */
int length; /* Number of non-NULL characters in the
* string. */
int spaceAvl; /* Total number of bytes available for the
* string and its terminating NULL char. */
char staticSpace[DSTRING_STATIC_SIZE];
/* Space to use in common case where string
* is small. */
} DString;
It is used there for some time and seems to have proven well. I had only a
short look at your document, but if I have understood correctly, you plan to
do something similar.
+1
Just my 2 cents.
Arnulf
Am Dienstag, 13. September 2005 17:38 schrieb Kay Ramme - Sun Germany -
Hamburg:
Hi guys,
as the performance of rtl::OUStrings (the UNO C/C++ String) is coming up
for discussions once a while (because of showing up in profiles e.g.
when loading a large spreadsheet), I wrote a short paper
http://udk.openoffice.org/common/man/concept/string_invest.html
investigating especially into construction&destruction and suggesting a
slightly modified variant, with improved behavior. So, if you have some
time left, I would like to get your feedback ;-).
Thanks in advance
Kay
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