//-< TESTPERF.CPP >--------------------------------------------------*--------*// FastDB                    Version 1.0         (c) 1999  GARRET    *     ?  *// (Main Memory Database Management System)                          *   /\|  *//                                                                   *  /  \  *//                          Created:     10-Feb-98    K.A. Knizhnik  * / [] \ *//                          Last update: 10-Feb-99    K.A. Knizhnik  * GARRET *//-------------------------------------------------------------------*--------*// Test for index insert/search/delete operations//-------------------------------------------------------------------*--------*#include <stdio.h>#include "fastdb.h"USE_FASTDB_NAMESPACEconst int nInsertedRecords = 10000000;const int nRecords = 100000;const int maxDuplicates = 256;class Record {   public:    nat8 key;    TYPE_DESCRIPTOR((KEY(key, INDEXED) ));};REGISTER(Record);int main() {    dbDatabase db(dbDatabase::dbAllAccess, 4096); // 32Mb page pool    if (db.open("testidx")) {         nat8 insKey = 1999;        nat8 delKey = 1999;        db_int8 key;        dbQuery q;        Record  rec;        dbCursor<Record> cursor(dbCursorForUpdate);        q = "key=",key;        time_t start = time(NULL);        for (int i = 0, j = 0, n = 0; i < nInsertedRecords;) {             if (n >= nRecords) {                 delKey = (3141592621u*delKey + 2718281829u) % 1000000007u;                key = delKey;                unsigned r = cursor.select(q);                assert(r == ((unsigned)delKey % maxDuplicates) + 1);                n -= r;                cursor.removeAllSelected();            }                       insKey = (3141592621u*nat8(insKey) + 2718281829u) % 1000000007;            unsigned r = ((unsigned)insKey % maxDuplicates) + 1;            rec.key = insKey;            n += r;            i += r;            do {                 insert(rec);            } while (--r != 0);            if (i > j) {                 printf("Insert %d objects...\r", i);                fflush(stdout);                j = i + 1000;            }        }        printf("Elapsed time for %d record: %d seconds\n",                nInsertedRecords, int(time(NULL) - start));        db.close();        return EXIT_SUCCESS;    } else {         printf("Failed to open database\n");        return EXIT_FAILURE;    }}