Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,136 @@
+/*
+   igraph library.
+   Copyright (C) 2024  The igraph development team <igraph@igraph.org>
+
+   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 2 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 <igraph.h>
+
+#include "bench.h"
+
+void gnp(igraph_int_t n, igraph_real_t p, igraph_bool_t directed, igraph_edge_type_sw_t allowed_edge_types) {
+    igraph_t g;
+    igraph_erdos_renyi_game_gnp(&g, n, p, directed, allowed_edge_types, IGRAPH_EDGE_UNLABELED);
+    igraph_destroy(&g);
+}
+
+void gnm(igraph_int_t n, igraph_real_t meandeg, igraph_bool_t directed, igraph_edge_type_sw_t allowed_edge_types) {
+    igraph_t g;
+    igraph_erdos_renyi_game_gnm(&g, n, round(directed ? n * meandeg : 0.5 * n * meandeg), directed, allowed_edge_types, IGRAPH_EDGE_UNLABELED);
+    igraph_destroy(&g);
+}
+
+void chung_lu(const igraph_vector_t *outdeg, const igraph_vector_t *indeg, igraph_bool_t loops) {
+    igraph_t g;
+    igraph_chung_lu_game(&g, outdeg, indeg, loops, IGRAPH_CHUNG_LU_ORIGINAL);
+    igraph_destroy(&g);
+}
+
+void run_bench(igraph_int_t vcount, igraph_real_t meandeg, igraph_int_t rep) {
+    igraph_t g;
+    igraph_real_t p = meandeg / vcount;
+    igraph_vector_t outdeg, indeg;
+    char msg[128], msg2[80];
+
+    snprintf(msg2, sizeof(msg2) / sizeof(msg2[0]),
+             "vcount=%" IGRAPH_PRId ", meandeg=%g, %" IGRAPH_PRId "x",
+             vcount, meandeg, rep);
+
+    igraph_vector_init(&outdeg, 0);
+    igraph_vector_init(&indeg, 0);
+
+    igraph_erdos_renyi_game_gnp(&g, vcount, p, IGRAPH_UNDIRECTED, IGRAPH_SIMPLE_SW, IGRAPH_EDGE_UNLABELED);
+    igraph_strength(&g, &outdeg, igraph_vss_all(), IGRAPH_ALL, IGRAPH_LOOPS, NULL);
+    igraph_destroy(&g);
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 1 G(n,p)   undirected, no loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnp(vcount, p, IGRAPH_UNDIRECTED, IGRAPH_SIMPLE_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 2 G(n,m)   undirected, no loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnm(vcount, meandeg, IGRAPH_UNDIRECTED, IGRAPH_SIMPLE_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 3 Chung-Lu undirected, no loops, %s", msg2);
+    BENCH(msg, REPEAT(chung_lu(&outdeg, NULL, IGRAPH_NO_LOOPS), rep));
+
+    printf("\n");
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 4 G(n,p)   undirected,    loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnp(vcount, p, IGRAPH_UNDIRECTED, IGRAPH_LOOPS_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 5 G(n,m)   undirected,    loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnm(vcount, meandeg, IGRAPH_UNDIRECTED, IGRAPH_LOOPS_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 6 Chung-Lu undirected,    loops, %s", msg2);
+    BENCH(msg, REPEAT(chung_lu(&outdeg, NULL, IGRAPH_LOOPS), rep));
+
+    printf("\n");
+
+    igraph_erdos_renyi_game_gnp(&g, vcount, p, IGRAPH_DIRECTED, IGRAPH_SIMPLE_SW, IGRAPH_EDGE_UNLABELED);
+    igraph_strength(&g, &outdeg, igraph_vss_all(), IGRAPH_OUT, IGRAPH_LOOPS, NULL);
+    igraph_strength(&g, &indeg, igraph_vss_all(), IGRAPH_IN, IGRAPH_LOOPS, NULL);
+    igraph_destroy(&g);
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 7 G(n,p)     directed, no loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnp(vcount, p, IGRAPH_DIRECTED, IGRAPH_SIMPLE_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 8 G(n,m)     directed, no loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnm(vcount, meandeg, IGRAPH_DIRECTED, IGRAPH_SIMPLE_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             " 9 Chung-Lu   directed, no loops, %s", msg2);
+    BENCH(msg, REPEAT(chung_lu(&outdeg, &indeg, IGRAPH_NO_LOOPS), rep));
+
+    printf("\n");
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             "10 G(n,p)     directed,    loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnp(vcount, p, IGRAPH_DIRECTED, IGRAPH_LOOPS_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             "11 G(n,m)     directed,    loops / no multi, %s", msg2);
+    BENCH(msg, REPEAT(gnm(vcount, meandeg, IGRAPH_DIRECTED, IGRAPH_LOOPS_SW), rep));
+
+    snprintf(msg, sizeof(msg) / sizeof(msg[0]),
+             "12 Chung-Lu   directed,    loops, %s", msg2);
+    BENCH(msg, REPEAT(chung_lu(&outdeg, &indeg, IGRAPH_LOOPS), rep));
+
+    printf("\n\n");
+
+    igraph_vector_destroy(&indeg);
+    igraph_vector_destroy(&outdeg);
+}
+
+int main(void) {
+
+    igraph_rng_seed(igraph_rng_default(), 137);
+    BENCH_INIT();
+
+    run_bench(100, 3, 10000);
+    run_bench(10000, 3, 100);
+    run_bench(1000000, 3, 1);
+
+    run_bench(10000, 1, 1000);
+    run_bench(10000, 100, 10);
+
+    return 0;
+}