Mercurial > hg > octave-lyh

changeset 9486:d85a43495faa

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
update coding tips
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 05 Aug 2009 08:47:48 +0200
parents 3cee58bf4acf
children 2894af292e69
files doc/ChangeLog doc/interpreter/tips.txi
diffstat 2 files changed, 7 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,7 @@
+2009-08-05  Jaroslav Hajek  <highegg@gmail.com>
+
+	* interpreter/tips.txi: Update.
+
 2009-07-20  John W. Eaton  <jwe@octave.org>
 
 	* interpreter/contributors.in: Add Aleksej Saushev.
--- a/doc/interpreter/tips.txi
+++ b/doc/interpreter/tips.txi
@@ -110,6 +110,9 @@
 @item
 Avoid computing costly intermediate results multiple times. Octave currently
 does not eliminate common subexpressions.
+Also, certain internal computation results are cached for variables.
+For instance, if a matrix variable is used multiple times as an index,
+checking the indices (and internal conversion to integers) is only done once.
 
 @item
 Be aware of lazy copies (copy-on-write). When a copy of an object