From f4cd55ddf5cdab5b5e57ea31d66c232b48af32b1 Mon Sep 17 00:00:00 2001
From: John Cupitt <jcupitt@gmail.com>
Date: Fri, 26 Aug 2022 13:14:44 +0100
Subject: [PATCH] tweak popperload tile size

to make it big enough for an A4 page at 300dpi
---
 libvips/foreign/popplerload.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libvips/foreign/popplerload.c b/libvips/foreign/popplerload.c
index 0d0d7fe8..237e82d7 100644
--- a/libvips/foreign/popplerload.c
+++ b/libvips/foreign/popplerload.c
@@ -78,8 +78,11 @@
 
 /* Render PDFs with tiles this size. They need to be pretty big to limit 
  * overcomputation.
+ *
+ * An A4 page at 300dpi is 3508 pixels, so this should be enough to prevent
+ * most rerendering.
  */
-#define TILE_SIZE (2000)
+#define TILE_SIZE (4000)
 
 #define VIPS_TYPE_FOREIGN_LOAD_PDF (vips_foreign_load_pdf_get_type())
 #define VIPS_FOREIGN_LOAD_PDF( obj ) \