code: added app for testing query performance

code/apps/query-performance.c

@@ -0,0 +1,61 @@
+#define LIBRG_IMPL
+// #define LIBRG_ENTITY_MAXCHUNKS 1
+#include "librg.h"
+
+#define MAX_ENTITY 1000000
+#define QUERY_ATTEMPTS 1000
+
+int main() {
+    librg_world *world = librg_world_create();
+
+    /* create our world configuration */
+    librg_config_chunksize_set(world, 16, 16, 0);
+    librg_config_chunkamount_set(world, 64, 64, 0);
+    librg_config_chunkoffset_set(world, LIBRG_OFFSET_BEG, LIBRG_OFFSET_BEG, LIBRG_OFFSET_BEG);
+
+    zpl_f64 tstart = zpl_time_rel_ms();
+
+    /* create set of testing entities */
+    for (int i = 0; i < MAX_ENTITY; ++i) {
+        int chx = rand() % 64;
+        int chy = rand() % 64;
+
+        librg_entity_track(world, i);
+        librg_chunk chid = librg_chunk_from_chunkpos(world, chx, chy, 0);
+        librg_entity_chunk_set(world, i, chid);
+    }
+
+    zpl_printf("[test] tracked %d entities in (%.3f ms)\n", librg_world_entities_tracked(world), zpl_time_rel_ms() - tstart);
+
+    /* set owner to a single entity */
+    int ownerid = 1;
+    librg_entity_owner_set(world, 0, ownerid);
+
+    /* fetch entities via query */
+    int64_t entities[1000] = {0};
+    size_t entity_amount = 1000;
+    int query_radius = 16;
+
+    tstart = zpl_time_rel();
+
+    for (int i = 0; i < QUERY_ATTEMPTS; ++i) {
+        size_t entity_limit = 1000;
+        librg_world_query(world, ownerid, query_radius, entities, &entity_limit);
+        entity_amount = entity_limit;
+    }
+
+    zpl_printf("[test] found %d entities in (%.3f ms)\n", entity_amount, zpl_time_rel_ms() - tstart);
+
+    /* results */
+    //
+    // before switch to internal memory
+    // [test] found 171 entities in (7800.685 ms)
+    // [test] found 171 entities in (7789.673 ms)
+    // [test] found 171 entities in (7804.661 ms)
+    //
+    // after switch to internal memory
+    //
+
+    librg_world_destroy(world);
+    return 0;
+}