Re: How to optimize CString class in the debug version.
Good points! :o)
Tom
"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:fr1fd2ls4a67nkksfqq09bkcplek487voa@4ax.com...
Some time ago, somebody posted a query about being unable to create more
than a few
thousand array elements per second. It came out that he was in debug
mode, and appending
elements to an array one at a time. In release mode, with a GrowBy value
set to a
suitably large value, I was able to create 15,000,000 per second in
release mode. That's
a serious performance difference.
Someone who's asking this kind of question, and using new/delete on
CString, has a high
probability of being someone who doesn't understand the issues. I've even
seen people do
the following:
LPDWORD d;
d = new DWORD;
*d = value;
SomeAPI(d);
...use updated *d value here
delete d;
instead of the obvious
DWORD d = value;
SomeAPI(&d);
... use updated value in d
and then wondering why performance sucked. The rationale was "SomeAPI
wants an LPDWORD,
so that's what the variable has to be". So I worry about new/delete with
CStrings. There
are lots of legitimate reasons for doing new/delete of CStrings (such as
passing heap
pointers across thread boundaries), but far more situations, especially
for a beginner, in
which new is the only hammer and all the solutions look like nails.
joe
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Famous Quotes On Money).