Search take much time and not show search results

want to make advance search page in wordpress and almost it working fine, but when I use all the fields (12 fields) to search a particular post then it take much time and also not appear the search page. sorry for long code.

here is php code….

global $wp_query;
$query_vars = $wp_query->query_vars;
$post_per_page = 12;
global $term;
$term = (strip_tags($_GET['term']));
if (!empty($_GET['term'])) {
    add_filter('posts_where', 'taskerdev_posts_where');
}

$meta_query = array();
$closed = array(
    'key' => 'closed',
    'value' => "0",
    'compare' => '='
);
$meta_query[] = $closed;

if (!empty($_GET['tasker_cat_cat']))
    $tasker_cat = array(
        'taxonomy' => 'tasker_cat',
        'field' => 'slug',
        'terms' => $_GET['tasker_cat_cat']);
else
    $tasker_cat = '';
$meta_query[] = $tasker_cat;

if (!empty($_GET['vert_quality'])) {
    $tasker_cat_2 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_48',
            'value' => $_GET['vert_quality'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_4',
            'value' => $_GET['vert_quality'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_2 = '';
}
$meta_query[] = $tasker_cat_2;

if (!empty($_GET['est_quantity'])) {
    $tasker_cat_3 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_69',
            'value' => $_GET['est_quantity'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_27',
            'value' => $_GET['est_quantity'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_3 = '';
}
$meta_query[] = $tasker_cat_3;

if (!empty($_GET['comp_model'])) {
    $tasker_cat_4 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_28',
            'value' => $_GET['comp_model'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_1',
            'value' => $_GET['comp_model'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_4 = '';
}
$meta_query[] = $tasker_cat_4;

if (!empty($_GET['delivery_type'])) {
    $tasker_cat_5 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_70',
            'value' => $_GET['delivery_type'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_30',
            'value' => $_GET['delivery_type'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_5 = '';
}
$meta_query[] = $tasker_cat_5;

if (!empty($_GET['target_option'])) {
    $tasker_cat_6 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_29',
            'value' => $_GET['target_option'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_67',
            'value' => $_GET['target_option'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_6 = '';
}
$meta_query[] = $tasker_cat_6;

if (!empty($_GET['tracking_method'])) {
    $tasker_cat_7 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_72',
            'value' => $_GET['tracking_method'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_25',
            'value' => $_GET['tracking_method'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_7 = '';
}
$meta_query[] = $tasker_cat_7;

if (!empty($_GET['revenue_auditing'])) {
    $tasker_cat_8 = array(
        'relation' => 'OR',
        array(
            'key' => 'custom_field_value_26',
            'value' => $_GET['revenue_auditing'],
            'compare' => '='
        ),
        array(
            'key' => 'custom_field_value_66',
            'value' => $_GET['revenue_auditing'],
            'compare' => '='
        )
    );
} else {
    $tasker_cat_8 = '';
}
$meta_query[] = $tasker_cat_8;

if ($_GET['feature_listing'] == "1") {

    $tasker_cat_9 = array(
        'relation' => 'OR',
        array(
            'key' => 'featured',
            'value' => "1",
            'compare' => '='
        ),
        array(
            'key' => 'featured_paid',
            'value' => "1",
            'compare' => '='
        )
    );
} else {
    $tasker_cat_9 = '';
}
$meta_query[] = $tasker_cat_9;

if (!empty($_GET['post_tag_cat'])) {
    $tasker_tag = array(
        'taxonomy' => 'post_tag',
        'field' => 'slug',
        'terms' => $_GET['post_tag_cat']);
} else
    $tasker_tag = '';
$meta_query[] = $tasker_tag;

if (!empty($_GET['tasker_location_cat']))
    $tasker_location = array(
        'key' => 'tasker_location_cat',
        'value' => $_GET['tasker_location_cat'],
        'compare' => '='
    );
else
    $tasker_location = '';
$meta_query[] = $tasker_location;

if (isset($_GET['pricemin']) || isset($_GET['pricemax'])) {

    if (!empty($_GET['pricemax']))
        $max = $_GET['pricemax'];
    else
        $max = 99999999;
    if (!empty($_GET['pricemin']))
        $min = $_GET['pricemin'];
    else
        $min = 0;

    $price_q = array(
        'key' => 'price',
        'value' => array($min, $max),
        'type' => 'numeric',
        'compare' => 'BETWEEN'
    );

    $meta_query[] = $price_q;
}

$tp = array('task', 'service');
if (isset($_GET['post_type2']) and ! empty($_GET['post_type2']))
    $tp = $_GET['post_type2'];
$args = array('post_type' => $tp, 'order' => 'DESC', 'orderby' => 'date', 'posts_per_page' => $post_per_page,
    'paged' => $query_vars['paged'], 'meta_query' => $meta_query, 'tax_query' => array($tasker_cat, $tasker_location, $tasker_tag));
print_r($args);
die("end");
query_posts($args);

if (have_posts()) :
    while (have_posts()) : the_post();

        global $post;
        ?>

        <?php if ($view == "grid"): ?>
            <?php
            if ($post->post_type == "task"): TaskerDev_get_post_task_main_function_grid_new_design();
            else: TaskerDev_get_post_service_main_function_grid_new_design();
            endif;
            ?>
        <?php else: ?>
            <?php
            if ($post->post_type == "task"): TaskerDev_get_post_task_main_function_new_design();
            else: TaskerDev_get_post_service_main_function_new_design();
            endif;
            ?>
        <?php endif; ?>

        <?php
    endwhile;

    if (function_exists('wp_pagenavi')):
        wp_pagenavi();
    endif;

else:

    _e("There are no active Taste Requests/Taste Offer according your search.", 'TaskerDev');

endif;

wp_reset_query();
?>

https://www.ads-software.com/plugins/search/