1，事务处理两条更新成功的执行速度

$fp = fopen('test_success.csv','w+');
        for($i=0; $i<10; $i++){
            $start = $this->microtime_float();
            DB::beginTransaction();
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,1]);
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,2]);
            DB::commit();
            $complete = $this->microtime_float();
            echo 'used '.round(($complete-$start), 2).' s'.PHP_EOL;
            $str = 'used '.round(($complete-$start), 2).' s';
            fputcsv($fp, [$str]);
        }
        fclose($fp);

// 耗费时间分别是：
"0.39 s"
"0.41 s"
"0.14 s"
"0.14 s"
"0.15 s"
"0.14 s"
"0.14 s"
"0.14 s"
"0.14 s"
"0.14 s"
2，事务处理两条，一条更新成功，另一条失败，回滚的执行速度

$fp = fopen('test_fail.csv','w+');
        for($i=0; $i<10; $i++){
            $start = $this->microtime_float();
            DB::beginTransaction();
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,1]);
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,3]);
            DB::commit();
            $complete = $this->microtime_float();
            echo 'used '.round(($complete-$start), 2).' s'.PHP_EOL;
            $str = round(($complete-$start), 2).' s'.PHP_EOL;
            fputcsv($fp, [$str]);
        }
        fclose($fp);

// 耗费时间分别是：
"0.52 s"
"0.26 s"
"0.2 s"
"0.19 s"
"0.19 s"
"0.19 s"
"0.2 s"
"0.19 s"
"0.19 s"
"0.19 s"

3，非事务执行成功效率

$fp = fopen('normal_success.csv','w+');
        for($i=0; $i<10; $i++){
            $start = $this->microtime_float();
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,1]);
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,2]);
            $complete = $this->microtime_float();
            echo 'used '.round(($complete-$start), 2).' s'.PHP_EOL;
            $str = round(($complete-$start), 2).' s';
            fputcsv($fp, [$str]);
        }
        fclose($fp);

//耗费时间分别是：
"0.45 s"
"0.13 s"
"0.14 s"
"0.15 s"
"0.14 s"
"0.13 s"
"0.13 s"
"0.13 s"
"0.13 s"
"0.13 s"
4，非事务执行，一个成功一个失败效率

$fp = fopen('normal_fail.csv','w+');
        for($i=0; $i<10; $i++){
            $start = $this->microtime_float();
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,1]);
            DB::update('update resource set name = ? where id = ?', ['资源'.$i,3]);
            $complete = $this->microtime_float();
            echo 'used '.round(($complete-$start), 2).' s'.PHP_EOL;
            $str = round(($complete-$start), 2).' s';
            fputcsv($fp, [$str]);
        }
        fclose($fp);

耗费时间分别是：
"0.33 s"
"0.1 s"
"0.1 s"
"0.11 s"
"0.09 s"
"0.09 s"
"0.09 s"
"0.1 s"
"0.11 s"
"0.1 s"