--- /dev/null
+/* Benchmark fclose.
+ Copyright (C) 2024 Free Software Foundation, Inc.
+ Copyright The GNU Toolchain Authors.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "bench-timing.h"
+#include "json-lib.h"
+
+#define NUM_FILES 1000000
+#define NUM_FCLOSE 100
+
+int
+main (int argc, char **argv)
+{
+ json_ctx_t json_ctx;
+ json_init (&json_ctx, 0, stdout);
+ json_document_begin (&json_ctx);
+
+ json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
+ json_attr_object_begin (&json_ctx, "functions");
+ json_attr_object_begin (&json_ctx, "fclose");
+
+ FILE *ff, *keep[NUM_FCLOSE];
+ int i;
+
+ for (i = 0; i < NUM_FILES; i++)
+ {
+ ff = fdopen (STDIN_FILENO, "r");
+ if (!ff)
+ {
+ fprintf (stderr, "### failed to fdopen: %m\n");
+ return EXIT_FAILURE;
+ }
+ if (i < NUM_FCLOSE)
+ keep[i] = ff;
+ }
+
+ timing_t start, stop, elapsed;
+
+ TIMING_NOW (start);
+
+ for (i = 0; i < NUM_FCLOSE; i++)
+ fclose (keep[i]);
+
+ TIMING_NOW (stop);
+
+ TIMING_DIFF (elapsed, start, stop);
+
+ json_attr_uint (&json_ctx, "number of FILEs", NUM_FILES);
+ json_attr_uint (&json_ctx, "number of fclose calls", NUM_FCLOSE);
+ json_attr_uint (&json_ctx, "duration", elapsed);
+
+ json_attr_object_end (&json_ctx);
+ json_attr_object_end (&json_ctx);
+ json_document_end (&json_ctx);
+
+ return 0;
+}