我正在调查为什么我的 C-test-program(libmysql) 的速度几乎是相同 php-test(cli) 程序的两倍:
我正在创建一个准备好的语句并插入 10 条记录。
php-cli-version(mysqlnd) 几乎是使用 libmysql 的 C 版本的两倍。我正在这样测试:time ./dbctest && timephp phptest.php
C版:
/*gcc dbctest.c -o dbctest -lm -lmysqlclient -lz -std=c99 */
#include <my_global.h>
#include <mysql.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char my_str[16];
int my_str_length=0;
static void insert_records (MYSQL_STMT *stmt)
{
char *stmt_str = "insert into bleach values (?)";
MYSQL_BIND param[1];
//printf ("Inserting records...\n");
if (mysql_stmt_prepare (stmt, stmt_str, strlen (stmt_str)) != 0)
{
fprintf(stderr,"\nCant prepare...");
return;
}
memset ((void *) param, 0, sizeof (param)); /* zero the structures */
strcpy (my_str,"test");
my_str[5] = '\0';
my_str_length = strlen (my_str);
param[0].buffer_type = MYSQL_TYPE_STRING;
param[0].buffer = (void *) my_str;
param[0].buffer_length = sizeof (my_str);
param[0].is_null = 0;
if (mysql_stmt_bind_param (stmt, param) != 0)
{
fprintf(stderr,"\nCant bind..");
return;
}
for (int i = 1; i < 10; i++)
{
if (mysql_stmt_execute (stmt) != 0)
{
fprintf(stderr,"Error inserting row");
return;
}
}
}
int main (int argc, char *argv[])
{
MYSQL *conn;
conn = mysql_init(NULL);
if (conn == NULL)
{
printf("Error %u: %s\n", mysql_errno(conn), mysql_error(conn));
exit(1);
}
if (mysql_real_connect(conn, "127.0.0.1", "root","password", "test_db", 0, NULL, 0) == NULL)
{
printf("Error %u: %s\n", mysql_errno(conn), mysql_error(conn));
exit(1);
}
MYSQL_STMT *stmt;
stmt = mysql_stmt_init (conn);
insert_records(stmt);
exit (0);
}
PHP版本:
<?php
$mysqli = new mysqli("127.0.0.1", "root", "password", "test_db");
$name = "TEST-PHP";
$stmt = $mysqli->prepare("insert into bleach values (?)");
$stmt->bind_param('s', $name);
for($i=0;$i< 10;$i++)
{
$stmt->execute();
}
$mysqli->close();
?>