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/*
** Performance test for SQLite.
**
** This program reads ASCII text from a file named on the command-line.
** It converts each SQL statement into UTF16 and submits it to SQLite
** for evaluation. A new UTF16 database is created at the beginning of
** the program. All statements are timed using the high-resolution timer
** built into Intel-class processors.
**
** To compile this program, first compile the SQLite library separately
** will full optimizations. For example:
**
** gcc -c -O6 -DSQLITE_THREADSAFE=0 sqlite3.c
**
** Then link against this program. But to do optimize this program
** because that defeats the hi-res timer.
**
** gcc speedtest16.c sqlite3.o -ldl
**
** Then run this program with a single argument which is the name of
** a file containing SQL script that you want to test:
**
** ./a.out database.db test.sql
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include "sqlite3.h"
/*
** The following routine only works on pentium-class processors.
** It uses the RDTSC opcode to read the cycle count value out of the
** processor and returns that value. This can be used for high-res
** profiling.
*/
__inline__ unsigned long long int hwtime(void){
unsigned int lo, hi;
/* We cannot use "=A", since this would use %rax on x86_64 */
__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
return (unsigned long long int)hi << 32 | lo;
}
/*
** Convert a zero-terminated ASCII string into a zero-terminated
** UTF-16le string. Memory to hold the returned string comes
** from malloc() and should be freed by the caller.
*/
static void *asciiToUtf16le(const char *z){
int n = strlen(z);
char *z16;
int i, j;
z16 = malloc( n*2 + 2 );
for(i=j=0; i<=n; i++){
z16[j++] = z[i];
z16[j++] = 0;
}
return (void*)z16;
}
/*
** Timers
*/
static unsigned long long int prepTime = 0;
static unsigned long long int runTime = 0;
static unsigned long long int finalizeTime = 0;
/*
** Prepare and run a single statement of SQL.
*/
static void prepareAndRun(sqlite3 *db, const char *zSql){
void *utf16;
sqlite3_stmt *pStmt;
const void *stmtTail;
unsigned long long int iStart, iElapse;
int rc;
printf("****************************************************************\n");
printf("SQL statement: [%s]\n", zSql);
utf16 = asciiToUtf16le(zSql);
iStart = hwtime();
rc = sqlite3_prepare16_v2(db, utf16, -1, &pStmt, &stmtTail);
iElapse = hwtime() - iStart;
prepTime += iElapse;
printf("sqlite3_prepare16_v2() returns %d in %llu cycles\n", rc, iElapse);
if( rc==SQLITE_OK ){
int nRow = 0;
iStart = hwtime();
while( (rc=sqlite3_step(pStmt))==SQLITE_ROW ){ nRow++; }
iElapse = hwtime() - iStart;
runTime += iElapse;
printf("sqlite3_step() returns %d after %d rows in %llu cycles\n",
rc, nRow, iElapse);
iStart = hwtime();
rc = sqlite3_finalize(pStmt);
iElapse = hwtime() - iStart;
finalizeTime += iElapse;
printf("sqlite3_finalize() returns %d in %llu cycles\n", rc, iElapse);
}
free(utf16);
}
int main(int argc, char **argv){
void *utf16;
sqlite3 *db;
int rc;
int nSql;
char *zSql;
int i, j;
FILE *in;
unsigned long long int iStart, iElapse;
unsigned long long int iSetup = 0;
int nStmt = 0;
int nByte = 0;
if( argc!=3 ){
fprintf(stderr, "Usage: %s FILENAME SQL-SCRIPT\n"
"Runs SQL-SCRIPT as UTF16 against a UTF16 database\n",
argv[0]);
exit(1);
}
in = fopen(argv[2], "r");
fseek(in, 0L, SEEK_END);
nSql = ftell(in);
zSql = malloc( nSql+1 );
fseek(in, 0L, SEEK_SET);
nSql = fread(zSql, 1, nSql, in);
zSql[nSql] = 0;
printf("SQLite version: %d\n", sqlite3_libversion_number());
unlink(argv[1]);
utf16 = asciiToUtf16le(argv[1]);
iStart = hwtime();
rc = sqlite3_open16(utf16, &db);
iElapse = hwtime() - iStart;
iSetup = iElapse;
printf("sqlite3_open16() returns %d in %llu cycles\n", rc, iElapse);
free(utf16);
for(i=j=0; j<nSql; j++){
if( zSql[j]==';' ){
int isComplete;
char c = zSql[j+1];
zSql[j+1] = 0;
isComplete = sqlite3_complete(&zSql[i]);
zSql[j+1] = c;
if( isComplete ){
zSql[j] = 0;
while( i<j && isspace(zSql[i]) ){ i++; }
if( i<j ){
nStmt++;
nByte += j-i;
prepareAndRun(db, &zSql[i]);
}
zSql[j] = ';';
i = j+1;
}
}
}
iStart = hwtime();
sqlite3_close(db);
iElapse = hwtime() - iStart;
iSetup += iElapse;
printf("sqlite3_close() returns in %llu cycles\n", iElapse);
printf("\n");
printf("Statements run: %15d\n", nStmt);
printf("Bytes of SQL text: %15d\n", nByte);
printf("Total prepare time: %15llu cycles\n", prepTime);
printf("Total run time: %15llu cycles\n", runTime);
printf("Total finalize time: %15llu cycles\n", finalizeTime);
printf("Open/Close time: %15llu cycles\n", iSetup);
printf("Total Time: %15llu cycles\n",
prepTime + runTime + finalizeTime + iSetup);
return 0;
}
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