Add benchmark for compose traversal

bench/compose-traversal.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright © 2023 Pierre Le Marre
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <time.h>
+
+#include "xkbcommon/xkbcommon-compose.h"
+
+#include "../test/test.h"
+#include "bench.h"
+
+#define BENCHMARK_ITERATIONS 1000
+
+int
+main(void)
+{
+    struct xkb_context *ctx;
+    char *path;
+    FILE *file;
+    struct xkb_compose_table *table;
+    struct xkb_compose_table_iterator *iter;
+    struct bench bench;
+    char *elapsed;
+
+    ctx = test_get_context(CONTEXT_NO_FLAG);
+    assert(ctx);
+
+    path = test_get_path("locale/en_US.UTF-8/Compose");
+    file = fopen(path, "rb");
+    if (file == NULL) {
+        perror(path);
+        free(path);
+        xkb_context_unref(ctx);
+        return -1;
+    }
+    free(path);
+
+    xkb_context_set_log_level(ctx, XKB_LOG_LEVEL_CRITICAL);
+    xkb_context_set_log_verbosity(ctx, 0);
+
+    table = xkb_compose_table_new_from_file(ctx, file, "",
+                                            XKB_COMPOSE_FORMAT_TEXT_V1,
+                                            XKB_COMPOSE_COMPILE_NO_FLAGS);
+    fclose(file);
+    assert(table);
+
+    bench_start(&bench);
+    for (int i = 0; i < BENCHMARK_ITERATIONS; i++) {
+        iter = xkb_compose_table_iterator_new(table);
+        while (xkb_compose_table_iterator_next(iter)) {
+            assert (xkb_compose_table_iterator_current(iter));
+        }
+        xkb_compose_table_iterator_free(iter);
+    }
+    bench_stop(&bench);
+
+    xkb_compose_table_unref(table);
+
+    elapsed = bench_elapsed_str(&bench);
+    fprintf(stderr, "traversed %d compose tables in %ss\n",
+            BENCHMARK_ITERATIONS, elapsed);
+    free(elapsed);
+
+    xkb_context_unref(ctx);
+    return 0;
+}

meson.build

@@ -767,6 +767,11 @@ benchmark(
     executable('bench-compose', 'bench/compose.c', dependencies: test_dep),
     env: bench_env,
 )
+benchmark(
+    'compose-traversal',
+    executable('bench-compose-traversal', 'bench/compose-traversal.c', dependencies: test_dep),
+    env: bench_env,
+)
 benchmark(
     'atom',
     executable('bench-atom', 'bench/atom.c', dependencies: test_dep),