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Add a case to speedtest1.c that demonstrates the need to factor OP_Column

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operators out of inner loops.

FossilOrigin-Name: 69a17336fdf4ae891e815914be8942f7222230c2
This commit is contained in:
drh
2013-12-21 00:04:37 +00:00
parent a47941fe42
commit ae28d6efc6
3 changed files with 29 additions and 8 deletions
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23
test/speedtest1.c
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@ -378,6 +378,19 @@ static void randomFunc(
sqlite3_result_int64(context, (sqlite3_int64)speedtest1_random());
}
/* Estimate the square root of an integer */
static int est_square_root(int x){
int y0 = x/2;
int y1;
int n;
for(n=0; y0>0 && n<10; n++){
y1 = (y0 + x/y0)/2;
if( y1==y0 ) break;
y0 = y1;
}
return y0;
}
/*
** The main and default testset
*/
@ -692,7 +705,15 @@ void testset_main(void){
speedtest1_exec("COMMIT");
speedtest1_end_test();
speedtest1_begin_test(320, "subquery in result set", n);
speedtest1_prepare(
"SELECT sum(a), max(c),\n"
" avg((SELECT a FROM t2 WHERE 5+t2.b=t1.b) AND rowid<?1), max(c)\n"
" FROM t1 WHERE rowid<?1;"
);
sqlite3_bind_int(g.pStmt, 1, est_square_root(g.szTest)*50);
speedtest1_run();
speedtest1_end_test();
speedtest1_begin_test(980, "PRAGMA integrity_check");
speedtest1_exec("PRAGMA integrity_check");