revi-archive/phorge-phorge
1
0
Fork 0
mirror of https://we.phorge.it/source/phorge.git synced 2024-09-20 01:08:50 +02:00
Code Issues Releases Wiki Activity

Clarify pitfalls document.

Browse source
This commit is contained in:
epriestley 2011-06-27 17:40:34 -07:00
parent e24f8b31ad
commit 63436ad74a
1 changed files with 5 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/docs/flavortext/php_pitfalls.diviner
View file

@ -4,9 +4,9 @@
This document discusses difficult traps and pitfalls in PHP, and how to avoid,
work around, or at least understand them.
= array_merge() in Incredibly Slow =
= array_merge() in Incredibly Slow When Merging A List of Arrays =
If you merge arrays like this:
If you merge a list of arrays like this:
COUNTEREXAMPLE
$result = array();
@ -14,9 +14,9 @@ If you merge arrays like this:
$result = array_merge($result, $one_list);
}
...your program now has a huge runtime runtime because it generates a large
number of intermediate arrays and copies every element it has previously seen
each time you iterate.
...your program now has a huge runtime because it generates a large number of
intermediate arrays and copies every element it has previously seen each time
you iterate.
In a libphutil environment, you can use ##array_mergev($list_of_lists)##
instead.