一个大的xslt比更小的更细粒的

We have one large xslt that renders a whole shop area including products, manifacturers and does filtering based on price and cateogry on top of that. I'm using sitecore as a CMS and I'm having problems with caching. I have about 9000 items and some pages take as much as 20s to render. Will it be better to split the xslt into smaller parts? Does it improve speed?We have one large xslt that renders a whole sho