Changes in directory llvm/docs:
ProgrammersManual.html updated: 1.120 -> 1.121
---
Log message:
add a note
---
Diffs of the changes: (+28 -1)
ProgrammersManual.html | 29 ++++++++++++++++++++++++++++-
1 files changed, 28 insertions(+), 1 deletion(-)
Index: llvm/docs/ProgrammersManual.html
diff -u llvm/docs/ProgrammersManual.html:1.120
llvm/docs/ProgrammersManual.html:1.121
--- llvm/docs/ProgrammersManual.html:1.120 Sat Feb 3 18:00:26 2007
+++ llvm/docs/ProgrammersManual.html Mon Feb 5 00:30:51 2007
@@ -797,6 +797,33 @@
itself (which would waste space for elements that aren't in the container).
vector is also useful when interfacing with code that expects vectors :).
</p>
+
+<p>One worthwhile note about std::vector: avoid code like this:</p>
+
+<div class="doc_code">
+<pre>
+for ( ... ) {
+ std::vector<foo> V;
+ use V;
+}
+</pre>
+</div>
+
+<p>Instead, write this as:</p>
+
+<div class="doc_code">
+<pre>
+std::vector<foo> V;
+for ( ... ) {
+ use V;
+ V.clear();
+}
+</pre>
+</div>
+
+<p>Doing so will save (at least) one heap allocation and free per iteration of
+the loop.</p>
+
</div>
<!-- _______________________________________________________________________
-->
@@ -3170,7 +3197,7 @@
<a href="mailto:[EMAIL PROTECTED]">Dinakar Dhurjati</a> and
<a href="mailto:[EMAIL PROTECTED]">Chris Lattner</a><br>
<a href="http://llvm.org";>The LLVM Compiler Infrastructure</a><br>
- Last modified: $Date: 2007/02/04 00:00:26 $
+ Last modified: $Date: 2007/02/05 06:30:51 $
</address>
</body>
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