SQLite

/*
** A program for performance testing.
**
** The available command-line options are described below:
*/
static const char zHelp[] =
  "Usage: %s [--options] DATABASE\n"
  "Options:\n"
  "  --autovacuum        Enable AUTOVACUUM mode\n"
  "  --big-transactions  Add BEGIN/END around large tests which normally don't\n"
  "  --cachesize N       Set the cache size to N\n"
  "  --checkpoint        Run PRAGMA wal_checkpoint after each test case\n"
  "  --exclusive         Enable locking_mode=EXCLUSIVE\n"
  "  --explain           Like --sqlonly but with added EXPLAIN keywords\n"
  "  --heap SZ MIN       Memory allocator uses SZ bytes & min allocation MIN\n"
  "  --incrvacuum        Enable incremenatal vacuum mode\n"
  "  --journal M         Set the journal_mode to M\n"

  int bVerify;               /* Try to verify that results are correct */
  int bMemShrink;            /* Call sqlite3_db_release_memory() often */
  int eTemp;                 /* 0: no TEMP.  9: always TEMP. */
  int szTest;                /* Scale factor for test iterations */
  int nRepeat;               /* Repeat selects this many times */
  int doCheckpoint;          /* Run PRAGMA wal_checkpoint after each trans */
  int nReserve;              /* Reserve bytes */
  int doBigTransactions;     /* Enable transactions on tests 410 and 510 */
  const char *zWR;           /* Might be WITHOUT ROWID */
  const char *zNN;           /* Might be NOT NULL */
  const char *zPK;           /* Might be UNIQUE or PRIMARY KEY */
  unsigned int x, y;         /* Pseudo-random number generator state */
  u64 nResByte;              /* Total number of result bytes */
  int nResult;               /* Size of the current result */
  char zResult[3000];        /* Text of the current result */

    sqlite3_bind_int(g.pStmt, 1, (sqlite3_int64)x1);
    sqlite3_bind_text(g.pStmt, 2, zNum, -1, SQLITE_STATIC);
    speedtest1_run();
  }
  speedtest1_exec("COMMIT");
  speedtest1_end_test();
  speedtest1_begin_test(410, "%d SELECTS on an IPK", n);
  if( g.doBigTransactions ){
    /* Historical note: tests 410 and 510 have historically not used
    ** explicit transactions. The --big-transactions flag was added
    ** 2022-09-08 to support the WASM/OPFS build, as the run-times
    ** approach 1 minute for each of these tests if they're not in an
    ** explicit transaction. The run-time effect of --big-transaciions
    ** on native builds is negligible. */
    speedtest1_exec("BEGIN");
  }
  speedtest1_prepare("SELECT b FROM t5 WHERE a=?1; --  %d times",n);
  for(i=1; i<=n; i++){
    x1 = swizzle(i,maxb);
    sqlite3_bind_int(g.pStmt, 1, (sqlite3_int64)x1);
    speedtest1_run();
  }
  if( g.doBigTransactions ){
    speedtest1_exec("COMMIT");
  }
  speedtest1_end_test();

  sz = n = g.szTest*700;
  zNum[0] = 0;
  maxb = roundup_allones(sz/3);
  speedtest1_begin_test(500, "%d REPLACE on TEXT PK", n);
  speedtest1_exec("BEGIN");

    sqlite3_bind_int(g.pStmt, 2, i);
    sqlite3_bind_text(g.pStmt, 1, zNum, -1, SQLITE_STATIC);
    speedtest1_run();
  }
  speedtest1_exec("COMMIT");
  speedtest1_end_test();
  speedtest1_begin_test(510, "%d SELECTS on a TEXT PK", n);
  if( g.doBigTransactions ){
    /* See notes for test 410. */
    speedtest1_exec("BEGIN");
  }
  speedtest1_prepare("SELECT b FROM t6 WHERE a=?1; --  %d times",n);
  for(i=1; i<=n; i++){
    x1 = swizzle(i,maxb);
    speedtest1_numbername(x1, zNum, sizeof(zNum));
    sqlite3_bind_text(g.pStmt, 1, zNum, -1, SQLITE_STATIC);
    speedtest1_run();
  }
  if( g.doBigTransactions ){
    speedtest1_exec("COMMIT");
  }
  speedtest1_end_test();
  speedtest1_begin_test(520, "%d SELECT DISTINCT", n);
  speedtest1_exec("SELECT DISTINCT b FROM t5;");
  speedtest1_exec("SELECT DISTINCT b FROM t6;");
  speedtest1_end_test();

  g.nRepeat = 1;
  for(i=1; i<argc; i++){
    const char *z = argv[i];
    if( z[0]=='-' ){
      do{ z++; }while( z[0]=='-' );
      if( strcmp(z,"autovacuum")==0 ){
        doAutovac = 1;
      }else if( strcmp(z,"big-transactions")==0 ){
        g.doBigTransactions = 1;
      }else if( strcmp(z,"cachesize")==0 ){
        if( i>=argc-1 ) fatal_error("missing argument on %s\n", argv[i]);
        i++;
        cacheSize = integerValue(argv[i]);
      }else if( strcmp(z,"exclusive")==0 ){
        doExclusive = 1;
      }else if( strcmp(z,"checkpoint")==0 ){