perf(pq_ctypes): use the faster byref() rather than pointer()

diff --git a/psycopg/psycopg/pq/pq_ctypes.py b/psycopg/psycopg/pq/pq_ctypes.py
index 6d29bd269711654358bcc079b5a9b2a2861be24a..f01a0d2310d3bcfd0106f9482dc20d00d8779c76 100644 (file)
--- a/psycopg/psycopg/pq/pq_ctypes.py
+++ b/psycopg/psycopg/pq/pq_ctypes.py
@@ -13,7 +13,7 @@ import logging
 from os import getpid
 from weakref import ref
 
-from ctypes import Array, POINTER, cast, pointer, string_at, create_string_buffer, byref
+from ctypes import Array, POINTER, cast, string_at, create_string_buffer, byref
 from ctypes import addressof, c_char_p, c_int, c_size_t, c_ulong, c_void_p, py_object
 from typing import Any, Callable, List, Optional, Sequence, Tuple
 from typing import cast as t_cast, TYPE_CHECKING
@@ -861,7 +861,11 @@ class PGcancel:
         See :pq:`PQcancel()` for details.
         """
         buf = create_string_buffer(256)
-        res = impl.PQcancel(self.pgcancel_ptr, pointer(buf), len(buf))  # type: ignore
+        res = impl.PQcancel(
+            self.pgcancel_ptr,
+            byref(buf),  # type: ignore[arg-type]
+            len(buf),
+        )
         if not res:
             raise e.OperationalError(
                 f"cancel failed: {buf.value.decode('utf8', 'ignore')}"
@@ -889,7 +893,7 @@ class Conninfo:
             raise TypeError(f"bytes expected, got {type(conninfo)} instead")
 
         errmsg = c_char_p()
-        rv = impl.PQconninfoParse(conninfo, pointer(errmsg))
+        rv = impl.PQconninfoParse(conninfo, byref(errmsg))  # type: ignore[arg-type]
         if not rv:
             if not errmsg:
                 raise MemoryError("couldn't allocate on conninfo parse")
@@ -973,10 +977,10 @@ class Escaping:
             out = create_string_buffer(len(data) * 2 + 1)
             impl.PQescapeStringConn(
                 self.conn._pgconn_ptr,
-                pointer(out),  # type: ignore
+                byref(out),  # type: ignore[arg-type]
                 data,
                 len(data),
-                pointer(error),
+                byref(error),  # type: ignore[arg-type]
             )
 
             if error:
@@ -987,7 +991,7 @@ class Escaping:
         else:
             out = create_string_buffer(len(data) * 2 + 1)
             impl.PQescapeString(
-                pointer(out),  # type: ignore
+                byref(out),  # type: ignore[arg-type]
                 data,
                 len(data),
             )
@@ -1007,10 +1011,14 @@ class Escaping:
                 self.conn._pgconn_ptr,
                 data,
                 len(data),
-                pointer(t_cast(c_ulong, len_out)),
+                byref(t_cast(c_ulong, len_out)),  # type: ignore[arg-type]
             )
         else:
-            out = impl.PQescapeBytea(data, len(data), pointer(t_cast(c_ulong, len_out)))
+            out = impl.PQescapeBytea(
+                data,
+                len(data),
+                byref(t_cast(c_ulong, len_out)),  # type: ignore[arg-type]
+            )
         if not out:
             raise MemoryError(
                 f"couldn't allocate for escape_bytea of {len(data)} bytes"
@@ -1027,7 +1035,10 @@ class Escaping:
             self.conn._ensure_pgconn()
 
         len_out = c_size_t()
-        out = impl.PQunescapeBytea(data, pointer(t_cast(c_ulong, len_out)))
+        out = impl.PQunescapeBytea(
+            data,
+            byref(t_cast(c_ulong, len_out)),  # type: ignore[arg-type]
+        )
         if not out:
             raise MemoryError(
                 f"couldn't allocate for unescape_bytea of {len(data)} bytes"