1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#include <time.h>
#include <stdio.h>
#define i_key uint64_t
#define i_val uint64_t
#define i_hash c_default_hash64
#define i_tag u64
#include <stc/cmap.h>
uint64_t romu_rotl(uint64_t val, uint32_t r)
{ return (val << r) | (val >> (64 - r)); }
uint64_t romu_trio(uint64_t s[3]) {
const uint64_t xp = s[0], yp = s[1], zp = s[2];
s[0] = 15241094284759029579u * zp;
s[1] = yp - xp; s[1] = romu_rotl(s[1], 12);
s[2] = zp - yp; s[2] = romu_rotl(s[2], 44);
return xp;
}
int main() {
c_auto (cmap_u64, m) {
const size_t n = 50000000, mask = (1 << 25) - 1;
cmap_u64_max_load_factor(&m, 0.8); cmap_u64_reserve(&m, n);
uint64_t rng[3] = {1872361123, 123879177, 87739234}, sum, ms = CLOCKS_PER_SEC/1000;
printf("STC cmap n = %zu, mask = 0x%zx\n", n, mask);
clock_t now = clock();
c_forrange (n) {
uint64_t key = romu_trio(rng) & mask;
cmap_u64_insert(&m, key, 0).ref->second += 1;
}
printf("insert : %zums \tsize : %zu\n", (clock() - now)/ms, cmap_u64_size(m));
now = clock();
sum = 0;
c_forrange (key, mask + 1) { sum += cmap_u64_contains(&m, key); }
printf("lookup : %zums \tsum : %zu\n", (clock() - now)/ms, sum);
now = clock();
sum = 0;
c_foreach (i, cmap_u64, m) { sum += i.ref->second; }
printf("iterate : %zums \tsum : %zu\n", (clock() - now)/ms, sum);
uint64_t rng2[3] = {1872361123, 123879177, 87739234};
now = clock();
c_forrange (n) {
uint64_t key = romu_trio(rng2) & mask;
cmap_u64_erase(&m, key);
}
printf("remove : %zums \tsize : %zu\n", (clock() - now)/ms, cmap_u64_size(m));
printf("press a key:\n"); getchar();
}
}
|
