WoW:USERAPI EraseTable: Difference between revisions

WoW:USERAPI EraseTable (source)

17 bytes added , 27 April 2009

m

WW:MOS

Anonymous user

@@ Line 1: / Line 1: @@
 {{localuserfunc}}
-Erases a table, often a good way to reduce garbage creation.  Note that erasing a table can be more expensive than letting the GC system reclaim it, so one might prefer simply reallocating a new empty table. Also note that a hash (as opposed to a 1..n integer-index) will NEVER SHRINK. Each key you ever used will use ~40 bytes and keep doing so until the table is destroyed. If you re-use the same keys this is obviously a nonissue.
+'''EraseTable''' erases a table, often a good way to reduce garbage creation. Note that erasing a table can be more expensive than letting the GC system reclaim it, so one might prefer simply reallocating a new empty table. Also, note that a hash (as opposed to a 1..n integer-index) will NEVER SHRINK. Each key you ever used will use ~40 bytes and keep doing so until the table is destroyed. If you re-use the same keys this is obviously a nonissue.
 For more details on the inner workings of tables and when to reallocate vs when to erase, see [[Lua object memory sizes]] and it's [[Talk:Lua object memory sizes|talk page]].