Function: sizebyte
Section: conversions
C-Name: gsizebyte
Prototype: lG
Help: sizebyte(x): number of bytes occupied by the complete tree of the
 object x.
Doc: outputs the total number of bytes occupied by the tree representing the
 PARI object $x$.
Variant: Also available is \fun{long}{gsizeword}{GEN x} returning a
 number of \emph{words}.