In general, Leopard should be faster, just as Tiger was*. In specific circumstances (for Tiger the usual example is while spotlight is indexing) I'm sure it will be slower, just as Tiger was.
*not necessarily due to any huge architectural change, or any particular "fix", but just due to each component having optimization work done on it. WebKit is much faster, for example (that much is publicly available), but each individual improvement to it was rarely more than a few %.
*not necessarily due to any huge architectural change, or any particular "fix", but just due to each component having optimization work done on it. WebKit is much faster, for example (that much is publicly available), but each individual improvement to it was rarely more than a few %.