stas 2002/07/29 23:04:15
Modified: src/docs/1.0/guide performance.pod
Log:
add a resource describing how to write a more efficient code
Submitted by: Rob Nagler
Revision Changes Path
1.20 +34 -0 modperl-docs/src/docs/1.0/guide/performance.pod
Index: performance.pod
===================================================================
RCS file: /home/cvs/modperl-docs/src/docs/1.0/guide/performance.pod,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -r1.19 -r1.20
--- performance.pod 14 Jul 2002 06:48:08 -0000 1.19
+++ performance.pod 30 Jul 2002 06:04:15 -0000 1.20
@@ -3594,6 +3594,17 @@
in the normal way (no C<E<lt>PerlE<gt>> section required).
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=head1 TMTOWTDI: Convenience and Habit vs. Performance
TMTOWTDI (sometimes pronounced I<"tim toady">), or I<"There's More
@@ -3612,6 +3623,11 @@
benchmarks to support the theory, since however good the theory its
the numbers we get in practice that matter.
+"Premature optimizations are evil", the saying goes. I believe that
+knowing how to write an efficient code in first place, where it
+doesn't make the quality and clarity suffer saves time in the long
+run. That's what this section is mostly about.
+
In the following benchmarks, unless told different the following
Apache configuration has been used:
@@ -4665,6 +4681,24 @@
print "$filename was modified $mod_time seconds before startup\n";
Two stat() calls were saved!
+
+=head2 Optimizing Code
+
+Here are some other resources that explain how to optimize your code,
+which are usually applied when you profile your code and need to
+optimize it but in many cases are useful to know when you develop the
+code.
+
+=over
+
+=item *
+
+Interesting C code optimization notes, most applying to Perl code as
+well: http://www.utsc.utoronto.ca/~harper/cscb09/lecture11.html#code
+
+=back
+
+[ReaderMETA]: please send me similar resources if you know of such.
=head1 Apache::Registry and Derivatives Specific Notes
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