regular expression

Hi. I have the following expression: ?{m,n}+? Someone tells me that the '+' enhances regex performance by not saving back-track state during the expression evaluation. Can someone verify if this is true because I cannot find any document on this. I can only find that '+' means one or more occurrences of an expression.

Thanks,

paul0al

[359 byte] By [paul0ala] at [2007-9-29 18:57:25]