Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 8.12; MSIEMobile6.0) Sprint T7380)
I don't doubt that your device runs quicker after you disable javascript but I imagine you'll find many things or certain sites that won't function without javascript. But, if the sites you visit work fine then I'd say do what works for you.