From df62c25c8f54f8ca88104d930984bdb29af3c594 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sat, 11 May 2013 09:39:38 +0200
Subject: [PATCH] One more offset_ex() optimization

---
 lib/Slic3r/Layer/Region.pm | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/Slic3r/Layer/Region.pm b/lib/Slic3r/Layer/Region.pm
index aef13925..d8ab156d 100644
--- a/lib/Slic3r/Layer/Region.pm
+++ b/lib/Slic3r/Layer/Region.pm
@@ -258,12 +258,11 @@ sub make_perimeters {
             # non-collapsing regions
             push @{ $self->fill_surfaces },
                 map $_->simplify(&Slic3r::SCALED_RESOLUTION),
-                @{union_ex([
-                    Slic3r::Geometry::Clipper::offset(
-                        [Slic3r::Geometry::Clipper::offset([ map @$_, @last_offsets ], -($perimeter_spacing/2 + $infill_spacing))], 
+                    offset2_ex(
+                        [ map @$_, @last_offsets ],
+                        -($perimeter_spacing/2 + $infill_spacing),
                         +$infill_spacing,
-                    ),
-                ])};
+                    );
         }
         
         # fill gaps