diff --git a/configure.in b/configure.in
index b617a522992..48f6da283c9 100644
--- a/configure.in
+++ b/configure.in
@@ -2188,9 +2188,9 @@ ia64*-hpux*)
         esac
         # If we're building with --enable-profiling, we need a frame pointer.
         if test -z "$MOZ_PROFILING"; then
-            MOZ_OPTIMIZE_FLAGS="-Os -freorder-blocks -fomit-frame-pointer $MOZ_OPTIMIZE_SIZE_TWEAK"
+            MOZ_OPTIMIZE_FLAGS="-O3 -fomit-frame-pointer"
         else
-            MOZ_OPTIMIZE_FLAGS="-Os -freorder-blocks -fno-omit-frame-pointer $MOZ_OPTIMIZE_SIZE_TWEAK"
+            MOZ_OPTIMIZE_FLAGS="-O3 -fno-omit-frame-pointer"
         fi
         MOZ_DEBUG_FLAGS="-g"
     fi
diff --git a/js/src/configure.in b/js/src/configure.in
index ab2046bee47..fb32aa30859 100644
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -2107,9 +2107,9 @@ ia64*-hpux*)
         esac
         # If we're building with --enable-profiling, we need a frame pointer.
         if test -z "$MOZ_PROFILING"; then
-            MOZ_OPTIMIZE_FLAGS="-Os -freorder-blocks -fomit-frame-pointer $MOZ_OPTIMIZE_SIZE_TWEAK"
+            MOZ_OPTIMIZE_FLAGS="-O3 -fomit-frame-pointer"
         else
-            MOZ_OPTIMIZE_FLAGS="-Os -freorder-blocks -fno-omit-frame-pointer $MOZ_OPTIMIZE_SIZE_TWEAK"
+            MOZ_OPTIMIZE_FLAGS="-O3 -fno-omit-frame-pointer"
         fi
         MOZ_DEBUG_FLAGS="-g"
     fi
diff --git a/xpcom/io/Makefile.in b/xpcom/io/Makefile.in
index 61cd64aba28..a9036fa164d 100644
--- a/xpcom/io/Makefile.in
+++ b/xpcom/io/Makefile.in
@@ -51,7 +51,7 @@ MOZILLA_INTERNAL_API = 1
 # work around bug 408258
 ifdef GNU_CC 
 ifneq ($(OS_ARCH), Darwin)
-MODULE_OPTIMIZE_FLAGS = -Os -fno-strict-aliasing $(MOZ_OPTIMIZE_SIZE_TWEAK)
+MODULE_OPTIMIZE_FLAGS = -O3 -fno-strict-aliasing
 endif
 endif