From 8e9e94dba971e3b09d4a9853a8abcf68d5c6dc62 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 1 Dec 2022 19:40:21 -0700
Subject: [PATCH] Revert "[vector] Optimize grow_vector() for size"

This reverts commit 1dd9396c7a4c24fe9d578551fab735bdd699e52a.

Is faster indeed.

15% on SourceHanSans/10000 benchmark.
---
 src/hb-vector.hh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/hb-vector.hh b/src/hb-vector.hh
index 397571ae9..9b52f5ca9 100644
--- a/src/hb-vector.hh
+++ b/src/hb-vector.hh
@@ -254,6 +254,16 @@ struct hb_vector_t
     return new_array;
   }
 
+  template <typename T = Type,
+	    hb_enable_if (hb_is_trivially_constructible(T))>
+  void
+  grow_vector (unsigned size)
+  {
+    memset (arrayZ + length, 0, (size - length) * sizeof (*arrayZ));
+    length = size;
+  }
+  template <typename T = Type,
+	    hb_enable_if (!hb_is_trivially_constructible(T))>
   void
   grow_vector (unsigned size)
   {