From 831a951ab8efc969e843e71fb0ca73650c3bba4e Mon Sep 17 00:00:00 2001
From: Tyge Løvset <tylo@norceresearch.no>
Date: Tue, 2 Feb 2021 21:37:11 +0100
Subject: Improved csmap_ex2, and fixed README.md nagging bug.

---
 examples/csmap_ex2.c | 60 +++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 12 deletions(-)

(limited to 'examples')

diff --git a/examples/csmap_ex2.c b/examples/csmap_ex2.c
index 3c2d6cc7..ebb0f6cf 100644
--- a/examples/csmap_ex2.c
+++ b/examples/csmap_ex2.c
@@ -1,21 +1,57 @@
 #include <stc/csmap.h>
 #include <stc/crandom.h>
 #include <stdio.h>
+#include <time.h>
+#ifdef __cplusplus
+#include <map>
+#endif
 
 using_csmap(i, int, int);
-
+enum {N=10000000};
 int main()
 {
-    csmap_i map = csmap_i_init();
-    stc64_srandom(1);
-    c_forrange (i, 1000000) csmap_i_emplace(&map, stc64_random() & 0xffffff, i);
-
-    size_t n = 0, sum = 0;
-    c_foreach (i, csmap_i, map) {
-        sum += i.ref->first;
-        if (n++ < 20) printf("%d: %d\n", i.ref->first, i.ref->second);
+    clock_t t1, t2, t3, t4, t5;
+    {
+        t1 = clock();
+        csmap_i map = csmap_i_init();
+        stc64_srandom(1);
+        c_forrange (i, N)
+            csmap_i_emplace(&map, stc64_random() & 0xffffff, i);
+        c_forrange (i, N/2)
+            csmap_i_erase(&map, stc64_random() & 0xffffff);
+        t2 = clock();
+        size_t n = 0, sum = 0;
+        c_foreach (i, csmap_i, map)
+            sum += i.ref->first;
+        t3 = clock();
+        c_foreach (i, csmap_i, map)
+            if (n++ < 20) printf("%d: %d\n", i.ref->first, i.ref->second); else break;
+        printf("size %zu: %zu\n", csmap_i_size(map), sum);
+        t4 = clock();
+        csmap_i_del(&map);
+    }
+    t5 = clock();
+    printf("emplace: %g sec, sum: %g sec, destruct: %g sec\n", (float)(t2-t1)/CLOCKS_PER_SEC, (float)(t3-t2)/CLOCKS_PER_SEC, (float)(t5-t4)/CLOCKS_PER_SEC);
+#ifdef __cplusplus
+    {
+        t1 = clock();
+        std::map<int, int> map;
+        stc64_srandom(1);
+        c_forrange (i, N)
+            map.emplace(stc64_random() & 0xffffff, i);
+        c_forrange (i, N/2)
+            map.erase(stc64_random() & 0xffffff);
+        t2 = clock();
+        size_t n = 0, sum = 0;
+        for (auto i: map)
+            sum += i.first;
+        t3 = clock();
+        for (auto i: map)
+            if (n++ < 20) printf("%d: %d\n", i.first, i.second); else break;
+        printf("size %zu: %zu\n", map.size(), sum);
+        t4 = clock();
     }
-    printf("size %zu: %zu\n", csmap_i_size(map), sum);
-    csmap_i_del(&map);
-    puts("done");
+    t5 = clock();
+    printf("emplace %g sec, sum: %g sec, destruct: %g sec\n", (float)(t2-t1)/CLOCKS_PER_SEC, (float)(t3-t2)/CLOCKS_PER_SEC, (float)(t5-t4)/CLOCKS_PER_SEC);
+#endif
 }
\ No newline at end of file
-- 
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