diff --git a/configure.ac b/configure.ac
index 1551ded8..2f470672 100644
--- a/configure.ac
+++ b/configure.ac
@@ -976,21 +976,6 @@ if test "x$enable_debug" = "x1" ; then
 fi
 AC_SUBST([enable_debug])
 
-dnl Only optimize if not debugging.
-if test "x$enable_debug" = "x0" ; then
-  if test "x$GCC" = "xyes" ; then
-    JE_CFLAGS_ADD([-O3])
-    JE_CXXFLAGS_ADD([-O3])
-    JE_CFLAGS_ADD([-funroll-loops])
-  elif test "x$je_cv_msvc" = "xyes" ; then
-    JE_CFLAGS_ADD([-O2])
-    JE_CXXFLAGS_ADD([-O2])
-  else
-    JE_CFLAGS_ADD([-O])
-    JE_CXXFLAGS_ADD([-O])
-  fi
-fi
-
 dnl Enable statistics calculation by default.
 AC_ARG_ENABLE([stats],
   [AS_HELP_STRING([--disable-stats],