WoW:USERAPI EraseTable: Difference between revisions

WoW:USERAPI EraseTable (source)

175 bytes added , 11 January 2008

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-{{userfunc}}
+{{localuserfunc}}
 __NOTOC__
-Erases a table, often a good way to reduce garbage creation.  Note that erasing a table is generally 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.
+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]].
   local function EraseTable(t)
   	for i in pairs(t) do t[i] = nil end
   end