[Sbcl-commits] CVS: sbcl NEWS, 1.1265, 1.1266 version.lisp-expr, 1.3723, 1.3724

[Juho S. <js...@us...>]

Update of /cvsroot/sbcl/sbcl
In directory sc8-pr-cvs8.sourceforge.net:/tmp/cvs-serv6408

Modified Files:
	NEWS version.lisp-expr 
Log Message:
1.0.11.29: Faster CONCATENATE on strings
         
        * Add a result-type dependent DEFTRANSFORM which open-codes directly
          to calls to REPLACE.
        * Constant-fold the array reads for constant string arguments
          in the transform (intended as a slezy benchmark trick, but actually
          it looks as if having some literal strings mixed in with
          variables is pretty common in real world CONCATENATE uses).
        * Add transforms for REPLACE on mixed SIMPLE-BASE-STRINGS and
          (SIMPLE-ARRAY CHARACTER (*)) to support.
        * Speeds up a simple benchmark of concatenating two three-character
          strings by a factor of 15, and by a factor of 30 when the strings
          are constant. For a more real-world example, doing DIRECTORY on
          a large set of files speeds up by 25%.

        Also:

        * Fix a broken test (extra close paren) that was uncovered by
          the write-no-partial-fasls change.


Index: NEWS
===================================================================
RCS file: /cvsroot/sbcl/sbcl/NEWS,v
retrieving revision 1.1265
retrieving revision 1.1266
diff -u -d -r1.1265 -r1.1266
--- NEWS	17 Nov 2007 16:34:00 -0000	1.1265
+++ NEWS	18 Nov 2007 04:13:27 -0000	1.1266
@@ -5,6 +5,8 @@
     concurrent accesses (but not iteration.) See also:
     SB-EXT:WITH-LOCKED-HASH-TABLE, and
     SB-EXT:HASH-TABLE-SYNCHRONIZED-P.
+  * optimization: CONCATENATE on strings is an order of magnitue faster
+    in code compiled with (> SPEED SPACE)
   * bug fix: if file compilation is aborted, the partial fasl is now
     deleted, and COMPILE-FILE returns NIL as the primary value.
   * bug fix: number of thread safety issues relating to SBCL's internal

Index: version.lisp-expr
===================================================================
RCS file: /cvsroot/sbcl/sbcl/version.lisp-expr,v
retrieving revision 1.3723
retrieving revision 1.3724
diff -u -d -r1.3723 -r1.3724
--- version.lisp-expr	18 Nov 2007 01:13:40 -0000	1.3723
+++ version.lisp-expr	18 Nov 2007 04:13:27 -0000	1.3724
@@ -17,4 +17,4 @@
 ;;; checkins which aren't released. (And occasionally for internal
 ;;; versions, especially for internal versions off the main CVS
 ;;; branch, it gets hairier, e.g. "0.pre7.14.flaky4.13".)
-"1.0.11.28"
+"1.0.11.29"