CopyAttributeOutText_speedup.patch.txt

diff --git a/src/backend/commands/copyto.c b/src/backend/commands/copyto.c
index ae8b2e36d7..fcb200503f 100644
--- a/src/backend/commands/copyto.c
+++ b/src/backend/commands/copyto.c
@@ -29,6 +29,7 @@
 #include "mb/pg_wchar.h"
 #include "miscadmin.h"
 #include "pgstat.h"
+#include "port/pg_lfind.h"
 #include "storage/fd.h"
 #include "tcop/tcopprot.h"
 #include "utils/lsyscache.h"
@@ -1068,9 +1069,18 @@ CopyAttributeOutText(CopyToState cstate, const char *string)
 	else
 	{
 		start = ptr;
-		while ((c = *ptr) != '\0')
+
+		while (true)
 		{
-			if ((unsigned char) c < (unsigned char) 0x20)
+			while (!pg_lfind8('\\', (uint8 *) ptr, sizeof(Vector8)) &&
+				   !pg_lfind8(delimc, (uint8 *) ptr, sizeof(Vector8)) &&
+				   !pg_lfind8_le(31, (uint8 *) ptr, sizeof(Vector8)))
+				ptr += sizeof(Vector8);
+
+			if ((c = *ptr) == '\0')
+				break;
+
+			if ((unsigned char) c <= (unsigned char) 31)
 			{
 				/*
 				 * \r and \n must be escaped, the others are traditional. We