1 files changed, 69 insertions, 0 deletions
diff --git a/gnulib-tests/bench.h b/gnulib-tests/bench.h
new file mode 100644
index 0000000..4bfdbd4
--- /dev/null
+++ b/gnulib-tests/bench.h
@@ -0,0 +1,69 @@
+/* Utilities for benchmarks.
+   Copyright (C) 2018-2023 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+
+struct timings_state
+{
+  /* Filled when the timings start.  */
+  struct timeval real_start;
+  struct timeval user_start;
+  struct timeval sys_start;
+  /* Filled when the timings end.  */
+  long real_usec;
+  long user_usec;
+  long sys_usec;
+};
+
+static void
+timing_start (struct timings_state *ts)
+{
+  struct rusage usage;
+
+  getrusage (RUSAGE_SELF, &usage);
+  ts->user_start = usage.ru_utime;
+  ts->sys_start = usage.ru_stime;
+
+  gettimeofday (&ts->real_start, NULL);
+}
+
+static void
+timing_end (struct timings_state *ts)
+{
+  struct timeval real_end;
+  struct rusage usage;
+
+  gettimeofday (&real_end, NULL);
+
+  getrusage (RUSAGE_SELF, &usage);
+
+  ts->real_usec = (real_end.tv_sec - ts->real_start.tv_sec) * 1000000
+                  + real_end.tv_usec - ts->real_start.tv_usec;
+  ts->user_usec = (usage.ru_utime.tv_sec - ts->user_start.tv_sec) * 1000000
+                  + usage.ru_utime.tv_usec - ts->user_start.tv_usec;
+  ts->sys_usec = (usage.ru_stime.tv_sec - ts->sys_start.tv_sec) * 1000000
+                 + usage.ru_stime.tv_usec - ts->sys_start.tv_usec;
+}
+
+static void
+timing_output (const struct timings_state *ts)
+{
+  printf ("real %10.6f\n", (double)ts->real_usec / 1000000.0);
+  printf ("user %7.3f\n", (double)ts->user_usec / 1000000.0);
+  printf ("sys  %7.3f\n", (double)ts->sys_usec / 1000000.0);
+}