Don't start both timerfd and alarms on Cygwin

* src/atimer.c (set_alarm) [CYGWIN]: Don't start both timerfd and
alarms; this causes a slowdown.  (Bug#51734)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/atimer.c b/src/atimer.c
index 490c21bff16..9bde9c2446f 100644
--- a/src/atimer.c
+++ b/src/atimer.c
@@ -316,6 +316,13 @@ set_alarm (void)
               exit = true;
             }
 # endif
+
+# ifdef CYGWIN
+          /* Don't start both timerfd and alarms on Cygwin; this
+             causes a slowdown (bug#51734). */
+          if (exit)
+            return;
+# endif
           if (alarm_timer_ok
               && timer_settime (alarm_timer, TIMER_ABSTIME, &ispec, 0) == 0)
             exit = true;