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stb single-file public domain libraries for C/C++
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stb/tests/test_ds_cpp.cpp

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#include <stdio.h>
#ifdef DS_TEST
#define STBDS_UNIT_TESTS
#endif
#ifdef DS_STATS
#define STBDS_STATISTICS
#endif
#ifndef DS_PERF
#define STBDS_ASSERT assert
#include <assert.h>
#endif
//#define STBDS_SIPHASH_2_4
#define STB_DS_IMPLEMENTATION
#include "../stb_ds.h"
size_t churn_inserts, churn_deletes;
void churn(int a, int b, int count)
{
struct { int key,value; } *map=NULL;
int i,j,n,k;
for (i=0; i < a; ++i)
hmput(map,i,i+1);
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
hmput(map,i,i+1);
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
k=i-j-1;
k = hmdel(map,k);
assert(k != 0);
}
assert(hmlen(map) == a);
}
hmfree(map);
churn_inserts = i;
churn_deletes = (b-a) * n;
}
#ifdef DS_TEST
#include <stdio.h>
int main(int argc, char **argv)
{
stbds_unit_tests();
churn(0,100,1);
churn(3,7,50000);
churn(3,15,50000);
churn(16, 48, 25000);
churn(10, 15, 25000);
churn(200,500, 5000);
churn(2000,5000, 500);
churn(20000,50000, 50);
printf("Ok!");
return 0;
}
#endif
#ifdef DS_STATS
#define MAX(a,b) ((a) > (b) ? (a) : (b))
size_t max_hit_probes, max_miss_probes, total_put_probes, total_miss_probes, churn_misses;
void churn_stats(int a, int b, int count)
{
struct { int key,value; } *map=NULL;
int i,j,n,k;
churn_misses = 0;
for (i=0; i < a; ++i) {
hmput(map,i,i+1);
max_hit_probes = MAX(max_hit_probes, stbds_hash_probes);
total_put_probes += stbds_hash_probes;
stbds_hash_probes = 0;
}
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
hmput(map,i,i+1);
max_hit_probes = MAX(max_hit_probes, stbds_hash_probes);
total_put_probes += stbds_hash_probes;
stbds_hash_probes = 0;
}
for (j=0; j < (b-a)*10; ++j) {
k=i+j;
(void) hmgeti(map,k); // miss
max_miss_probes = MAX(max_miss_probes, stbds_hash_probes);
total_miss_probes += stbds_hash_probes;
stbds_hash_probes = 0;
++churn_misses;
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
k=i-j-1;
k = hmdel(map,k);
stbds_hash_probes = 0;
assert(k);
}
assert(hmlen(map) == a);
}
hmfree(map);
churn_inserts = i;
churn_deletes = (b-a) * n;
}
void reset_stats(void)
{
stbds_array_grow=0,
stbds_hash_grow=0;
stbds_hash_shrink=0;
stbds_hash_rebuild=0;
stbds_hash_probes=0;
stbds_hash_alloc=0;
stbds_rehash_probes=0;
stbds_rehash_items=0;
max_hit_probes = 0;
max_miss_probes = 0;
total_put_probes = 0;
total_miss_probes = 0;
}
void print_churn_probe_stats(char *str)
{
printf("Probes: %3d max hit, %3d max miss, %4.2f avg hit, %4.2f avg miss: %s\n",
(int) max_hit_probes, (int) max_miss_probes, (float) total_put_probes / churn_inserts, (float) total_miss_probes / churn_misses, str);
reset_stats();
}
int main(int arg, char **argv)
{
churn_stats(0,500000,1); print_churn_probe_stats("Inserting 500000 items");
churn_stats(0,500000,1); print_churn_probe_stats("Inserting 500000 items");
churn_stats(0,500000,1); print_churn_probe_stats("Inserting 500000 items");
churn_stats(0,500000,1); print_churn_probe_stats("Inserting 500000 items");
churn_stats(49000,50000,500); print_churn_probe_stats("Deleting/Inserting 500000 items");
churn_stats(49000,50000,500); print_churn_probe_stats("Deleting/Inserting 500000 items");
churn_stats(49000,50000,500); print_churn_probe_stats("Deleting/Inserting 500000 items");
churn_stats(49000,50000,500); print_churn_probe_stats("Deleting/Inserting 500000 items");
return 0;
}
#endif
#ifdef DS_PERF
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#define STB_DEFINE
#define STB_NO_REGISTRY
//#include "../stb.h"
size_t t0, sum, mn,mx,count;
void begin(void)
{
size_t t0;
LARGE_INTEGER m;
QueryPerformanceCounter(&m);
t0 = m.QuadPart;
sum = 0;
count = 0;
mx = 0;
mn = ~(size_t) 0;
}
void measure(void)
{
size_t t1, t;
LARGE_INTEGER m;
QueryPerformanceCounter(&m);
t1 = m.QuadPart;
t = t1-t0;
if (t1 < t0)
printf("ALERT: QueryPerformanceCounter was unordered!\n");
if (t < mn) mn = t;
if (t > mx) mx = t;
sum += t;
++count;
t0 = t1;
}
void dont_measure(void)
{
size_t t1, t;
LARGE_INTEGER m;
QueryPerformanceCounter(&m);
t0 = m.QuadPart;
}
double timer;
void end(void)
{
LARGE_INTEGER m;
QueryPerformanceFrequency(&m);
if (count > 3) {
// discard the highest and lowest
sum -= mn;
sum -= mx;
count -= 2;
}
timer = (double) (sum) / count / m.QuadPart * 1000;
}
void build(int a, int b, int count, int step)
{
struct { int key,value; } *map=NULL;
int i,j,n,k;
for (i=0; i < a; ++i)
hmput(map,i*step,i+1);
measure();
churn_inserts = i;
hmfree(map);
dont_measure();
}
#ifdef STB__INCLUDE_STB_H
void build_stb(int a, int b, int count, int step)
{
stb_idict *d = stb_idict_new_size(8);
struct { int key,value; } *map=NULL;
int i,j,n,k;
for (i=0; i < a; ++i)
stb_idict_add(d, i*step, i+1);
measure();
churn_inserts = i;
stb_idict_destroy(d);
dont_measure();
}
#endif
void churn_skip(unsigned int a, unsigned int b, int count)
{
struct { unsigned int key,value; } *map=NULL;
unsigned int i,j,n,k;
for (i=0; i < a; ++i)
hmput(map,i,i+1);
dont_measure();
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
hmput(map,i,i+1);
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
k=i-j-1;
k = hmdel(map,k);
assert(k != 0);
}
assert(hmlen(map) == a);
}
measure();
churn_inserts = i;
churn_deletes = (b-a) * n;
hmfree(map);
dont_measure();
}
typedef struct { int n[8]; } str32;
void churn32(int a, int b, int count, int include_startup)
{
struct { str32 key; int value; } *map=NULL;
int i,j,n;
str32 key = { 0 };
for (i=0; i < a; ++i) {
key.n[0] = i;
hmput(map,key,i+1);
}
if (!include_startup)
dont_measure();
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
key.n[0] = i;
hmput(map,key,i+1);
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
key.n[0] = i-j-1;
hmdel(map,key);
}
assert(hmlen(map) == a);
}
measure();
hmfree(map);
churn_inserts = i;
churn_deletes = (b-a) * n;
dont_measure();
}
typedef struct { int n[32]; } str256;
void churn256(int a, int b, int count, int include_startup)
{
struct { str256 key; int value; } *map=NULL;
int i,j,n;
str256 key = { 0 };
for (i=0; i < a; ++i) {
key.n[0] = i;
hmput(map,key,i+1);
}
if (!include_startup)
dont_measure();
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
key.n[0] = i;
hmput(map,key,i+1);
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
key.n[0] = i-j-1;
hmdel(map,key);
}
assert(hmlen(map) == a);
}
measure();
hmfree(map);
churn_inserts = i;
churn_deletes = (b-a) * n;
dont_measure();
}
void churn8(int a, int b, int count, int include_startup)
{
struct { size_t key,value; } *map=NULL;
int i,j,n,k;
for (i=0; i < a; ++i)
hmput(map,i,i+1);
if (!include_startup)
dont_measure();
for (n=0; n < count; ++n) {
for (j=a; j < b; ++j,++i) {
hmput(map,i,i+1);
}
assert(hmlen(map) == b);
for (j=a; j < b; ++j) {
k=i-j-1;
k = hmdel(map,k);
assert(k != 0);
}
assert(hmlen(map) == a);
}
measure();
hmfree(map);
churn_inserts = i;
churn_deletes = (b-a) * n;
dont_measure();
}
int main(int arg, char **argv)
{
int n,s,w;
double worst = 0;
#if 0
begin(); for (n=0; n < 2000; ++n) { build_stb(2000,0,0,1); } end(); printf(" // %7.2fms : 2,000 inserts creating 2K table\n", timer);
begin(); for (n=0; n < 500; ++n) { build_stb(20000,0,0,1); } end(); printf(" // %7.2fms : 20,000 inserts creating 20K table\n", timer);
begin(); for (n=0; n < 100; ++n) { build_stb(200000,0,0,1); } end(); printf(" // %7.2fms : 200,000 inserts creating 200K table\n", timer);
begin(); for (n=0; n < 10; ++n) { build_stb(2000000,0,0,1); } end(); printf(" // %7.2fms : 2,000,000 inserts creating 2M table\n", timer);
begin(); for (n=0; n < 5; ++n) { build_stb(20000000,0,0,1); } end(); printf(" // %7.2fms : 20,000,000 inserts creating 20M table\n", timer);
#endif
begin(); for (n=0; n < 2000; ++n) { churn8(2000,0,0,1); } end(); printf(" // %7.2fms : 2,000 inserts creating 2K table w/ 8-byte key\n", timer);
begin(); for (n=0; n < 500; ++n) { churn8(20000,0,0,1); } end(); printf(" // %7.2fms : 20,000 inserts creating 20K table w/ 8-byte key\n", timer);
begin(); for (n=0; n < 100; ++n) { churn8(200000,0,0,1); } end(); printf(" // %7.2fms : 200,000 inserts creating 200K table w/ 8-byte key\n", timer);
begin(); for (n=0; n < 10; ++n) { churn8(2000000,0,0,1); } end(); printf(" // %7.2fms : 2,000,000 inserts creating 2M table w/ 8-byte key\n", timer);
begin(); for (n=0; n < 5; ++n) { churn8(20000000,0,0,1); } end(); printf(" // %7.2fms : 20,000,000 inserts creating 20M table w/ 8-byte key\n", timer);
#if 0
begin(); for (n=0; n < 2000; ++n) { churn32(2000,0,0,1); } end(); printf(" // %7.2fms : 2,000 inserts creating 2K table w/ 32-byte key\n", timer);
begin(); for (n=0; n < 500; ++n) { churn32(20000,0,0,1); } end(); printf(" // %7.2fms : 20,000 inserts creating 20K table w/ 32-byte key\n", timer);
begin(); for (n=0; n < 100; ++n) { churn32(200000,0,0,1); } end(); printf(" // %7.2fms : 200,000 inserts creating 200K table w/ 32-byte key\n", timer);
begin(); for (n=0; n < 10; ++n) { churn32(2000000,0,0,1); } end(); printf(" // %7.2fms : 2,000,000 inserts creating 2M table w/ 32-byte key\n", timer);
begin(); for (n=0; n < 5; ++n) { churn32(20000000,0,0,1); } end(); printf(" // %7.2fms : 20,000,000 inserts creating 20M table w/ 32-byte key\n", timer);
begin(); for (n=0; n < 2000; ++n) { churn256(2000,0,0,1); } end(); printf(" // %7.2fms : 2,000 inserts creating 2K table w/ 256-byte key\n", timer);
begin(); for (n=0; n < 500; ++n) { churn256(20000,0,0,1); } end(); printf(" // %7.2fms : 20,000 inserts creating 20K table w/ 256-byte key\n", timer);
begin(); for (n=0; n < 100; ++n) { churn256(200000,0,0,1); } end(); printf(" // %7.2fms : 200,000 inserts creating 200K table w/ 256-byte key\n", timer);
begin(); for (n=0; n < 10; ++n) { churn256(2000000,0,0,1); } end(); printf(" // %7.2fms : 2,000,000 inserts creating 2M table w/ 256-byte key\n", timer);
begin(); for (n=0; n < 5; ++n) { churn256(20000000,0,0,1); } end(); printf(" // %7.2fms : 20,000,000 inserts creating 20M table w/ 256-byte key\n", timer);
#endif
begin(); for (n=0; n < 2000; ++n) { build(2000,0,0,1); } end(); printf(" // %7.2fms : 2,000 inserts creating 2K table w/ 4-byte key\n", timer);
begin(); for (n=0; n < 500; ++n) { build(20000,0,0,1); } end(); printf(" // %7.2fms : 20,000 inserts creating 20K table w/ 4-byte key\n", timer);
begin(); for (n=0; n < 100; ++n) { build(200000,0,0,1); } end(); printf(" // %7.2fms : 200,000 inserts creating 200K table w/ 4-byte key\n", timer);
begin(); for (n=0; n < 10; ++n) { build(2000000,0,0,1); } end(); printf(" // %7.2fms : 2,000,000 inserts creating 2M table w/ 4-byte key\n", timer);
begin(); for (n=0; n < 5; ++n) { build(20000000,0,0,1); } end(); printf(" // %7.2fms : 20,000,000 inserts creating 20M table w/ 4-byte key\n", timer);
begin(); for (n=0; n < 60; ++n) { churn_skip(2000,2100,5000); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 2K table\n", timer);
begin(); for (n=0; n < 30; ++n) { churn_skip(20000,21000,500); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 20K table\n", timer);
begin(); for (n=0; n < 15; ++n) { churn_skip(200000,201000,500); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 200K table\n", timer);
begin(); for (n=0; n < 8; ++n) { churn_skip(2000000,2001000,500); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 2M table\n", timer);
begin(); for (n=0; n < 5; ++n) { churn_skip(20000000,20001000,500); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 20M table\n", timer);
begin(); for (n=0; n < 1; ++n) { churn_skip(200000000u,200001000u,500); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 200M table\n", timer);
// even though the above measures a roughly fixed amount of work, we still have to build the table n times, hence the fewer measurements each time
begin(); for (n=0; n < 60; ++n) { churn_skip(1000,3000,250); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 2K table\n", timer);
begin(); for (n=0; n < 15; ++n) { churn_skip(10000,30000,25); } end(); printf(" // %7.2fms : 500,000 inserts & deletes in 20K table\n", timer);
begin(); for (n=0; n < 7; ++n) { churn_skip(100000,300000,10); } end(); printf(" // %7.2fms : 2,000,000 inserts & deletes in 200K table\n", timer);
begin(); for (n=0; n < 2; ++n) { churn_skip(1000000,3000000,10); } end(); printf(" // %7.2fms : 20,000,000 inserts & deletes in 2M table\n", timer);
// search for bad intervals.. in practice this just seems to measure execution variance
for (s = 2; s < 64; ++s) {
begin(); for (n=0; n < 50; ++n) { build(200000,0,0,s); } end();
if (timer > worst) {
worst = timer;
w = s;
}
}
for (; s <= 1024; s *= 2) {
begin(); for (n=0; n < 50; ++n) { build(200000,0,0,s); } end();
if (timer > worst) {
worst = timer;
w = s;
}
}
printf(" // %7.2fms(%d) : Worst time from inserting 200,000 items with spacing %d.\n", worst, w, w);
return 0;
}
#endif