Subject: Re: [MOP] add-method question
From: Erik Naggum <>
Date: 1999/11/16
Newsgroups: comp.lang.lisp
Message-ID: <>

* "H. Tunc Simsek" <simsek@EECS.Berkeley.Edu>
| On another note,  CMUCL says that
| (make-array 10 :element-type 'double-float)
| is not a simple vector.

  that's because a simple vector has element-type t by definition.  (and it
  has only one dimension, is not adjustable, has no fill-pointer, and is
  not displaced to another array, but you got that right, already.)

| As such it doesn't allow SVREF to access it.  It prevents optimizing a
| heavy computation (runge-kutte 4th order integration).

  if you declare it as the type it is, CMUCL will optimize it very well,
  and it won't even box the double-floats it extracts if they are only used
  very locally, with high optimize/speed settings.  CMUCL will tell you
  what you need to declare if you jack up the speed setting.

  Attention Microsoft Shoppers!  MS Monopoly Money 6.0 are now worthless.