This was discussed yesterday and previously. Please read the archives.
There is no positive performance reason to use varchar instead of text.
On 2010-07-22 05:38:14PM +0200, Armand Turpel wrote:
> Hi,
> I know this issue was controversed discussed. Some one see no really
> benefits of using varchar against text var. But i'm asking me what if i
> use it as array values. Is there any difference between varchar[126],
> varchar[10000] and text[] else than the number of chars i can store in?
> Performance, memory usage, ....?
>
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