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Update performance.md

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Arseny Kapoulkine 2021-08-30 20:45:00 -07:00 • committed by GitHub
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@ -102,7 +102,7 @@ Iterating through array-like tables using `for i=1,#t` tends to be slightly slow
Luau implements several optimizations for table creation. When creating object-like tables, it's recommended to use table literals (`{ ... }`) and to specify all table fields in the literal in one go instead of assigning fields later; this triggers an optimization inspired by LuaJIT's "table templates" and results in higher performance when creating objects. When creating array-like tables, if the maximum size of the table is known up front, it's recommended to use `table.create` function which can create an empty table with preallocated storage, and optionally fill it with a given value.
When the exact table shape isn't known, Luau compiler can still predict the table capacity required in case the table is initialized with an empty literal (`{}`) and filled with fields subsequently. For example, the following code only performs a single allocation:
When the exact table shape isn't known, Luau compiler can still predict the table capacity required in case the table is initialized with an empty literal (`{}`) and filled with fields subsequently. For example, the following code creates a correctly sized table implicitly:
```lua
local v = {}