X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/sod/blobdiff_plain/a9cffac12f45d917ae632f4037991d7ba66091fb..180bfa7ca8efeb1297a0bc3f0ff55b02b4e40f9b:/src/final.lisp

diff --git a/src/final.lisp b/src/final.lisp
index dd8834f..12b6294 100644
--- a/src/final.lisp
+++ b/src/final.lisp
@@ -44,4 +44,28 @@ (defun test-module (path reason)
 		   :if-does-not-exist :create)
     (output-module (read-module path) reason out)))
 
+;;;--------------------------------------------------------------------------
+;;; Calisthenics.
+
+(export 'exercise)
+(defun exercise ()
+  "Exercise the pieces of the metaobject protocol.
+
+   In some Lisps, the compiler is run the first time methods are called, to
+   do fancy just-in-time optimization things.  This is great, only the
+   program doesn't actually run for very long and a lot of that work is
+   wasted because we're going to have to do it again next time the program
+   starts.  Only, if we exercise the various methods, or at least a large
+   fraction of them, before we dump an image, then everything will be fast.
+
+   That's the theory anyway.  Call this function before you dump an image and
+   see what happens."
+
+  (clear-the-decks)
+  (dolist (reason '(:h :c))
+    (with-output-to-string (bitbucket)
+      (output-module *builtin-module* reason bitbucket)))
+
+  (clear-the-decks))
+
 ;;;----- That's all, folks --------------------------------------------------