From 558c7d8257d7381f21a3d641b7997af2798bb8ac Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Tue, 5 Jul 2016 21:53:38 -0400
Subject: [PATCH] Fast-track heap page size for a large allocation

---
 gc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index 95578a39..9bc27d3b 100644
--- a/gc.c
+++ b/gc.c
@@ -448,8 +448,13 @@ int gc_grow_heap(gc_heap * h, int heap_type, size_t size, size_t chunk_size)
       }
       h_last = h_last->next;
     }
-    if (new_size == 0)
+    if (new_size == 0) {
       new_size = prev_size + h_last->size;
+    }
+    // Fast-track heap page size if allocating a large block
+    if (new_size < size && size < HEAP_SIZE) {
+      new_size = HEAP_SIZE;
+    }
 #if GC_DEBUG_TRACE
     fprintf(stderr, "Growing heap %d new page size = %zu\n", heap_type,
             new_size);