[project @ 2001-09-17 16:51:55 by simonmar]

More small performance improvements

diff --git a/ghc/lib/std/PrelIO.hsc b/ghc/lib/std/PrelIO.hsc
index b4da0af..76cd36d 100644 (file)
--- a/ghc/lib/std/PrelIO.hsc
+++ b/ghc/lib/std/PrelIO.hsc
@@ -3,7 +3,7 @@
 #undef DEBUG_DUMP
 
 -- -----------------------------------------------------------------------------
--- $Id: PrelIO.hsc,v 1.14 2001/09/17 16:21:41 simonmar Exp $
+-- $Id: PrelIO.hsc,v 1.15 2001/09/17 16:51:55 simonmar Exp $
 --
 -- (c) The University of Glasgow, 1992-2001
 --
@@ -626,13 +626,15 @@ commitBuffer' hdl raw sz@(I## _) count@(I## _) flush release
                             else allocateBuffer size WriteBuffer
 
       -- release the buffer if necessary
-      if release && bufSize buf_ret == size
-        then do
+      case buf_ret of
+        Buffer{ bufSize=buf_ret_sz, bufBuf=buf_ret_raw } -> do
+          if release && buf_ret_sz == size
+           then do
              spare_bufs <- readIORef spare_buf_ref
              writeIORef spare_buf_ref 
-               (BufferListCons (bufBuf buf_ret) spare_bufs)
+               (BufferListCons buf_ret_raw spare_bufs)
              return buf_ret
-        else
+           else
              return buf_ret