From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Sat, 26 Mar 2022 00:18:05 +0000 (+0100)
Subject: perf: release the GIL in copy-related libpq functions
X-Git-Tag: 3.1~162
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6206c0fbf878ba5d9279ca377d21922ec92c251c;p=thirdparty%2Fpsycopg.git

perf: release the GIL in copy-related libpq functions

Tests have shown that these functions may do a considerable amount of
work, although purely CPU.
---

diff --git a/psycopg_c/psycopg_c/pq/libpq.pxd b/psycopg_c/psycopg_c/pq/libpq.pxd
index b554ff365..2f69e2fd1 100644
--- a/psycopg_c/psycopg_c/pq/libpq.pxd
+++ b/psycopg_c/psycopg_c/pq/libpq.pxd
@@ -253,9 +253,9 @@ cdef extern from "libpq-fe.h":
     PGnotify *PQnotifies(PGconn *conn) nogil
 
     # 33.9. Functions Associated with the COPY Command
-    int PQputCopyData(PGconn *conn, const char *buffer, int nbytes)
-    int PQputCopyEnd(PGconn *conn, const char *errormsg)
-    int PQgetCopyData(PGconn *conn, char **buffer, int async)
+    int PQputCopyData(PGconn *conn, const char *buffer, int nbytes) nogil
+    int PQputCopyEnd(PGconn *conn, const char *errormsg) nogil
+    int PQgetCopyData(PGconn *conn, char **buffer, int async) nogil
 
     # 33.10. Control Functions
     void PQtrace(PGconn *conn, FILE *stream);