Import multiple post via API.

Here is the function I am using to import posts from an API:

/**
 * Import vehicles
 */
function n4s_import_vehicles() {

	ini_set('max_execution_time', 300);

	//Initialize curl
	$ch = curl_init(); 

	curl_setopt($ch, CURLOPT_URL, 'http://api.curtmfg.com/v2/GetVehicle?year=&make=&model=&style=&dataType=JSON');
	curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	$ch_data = curl_exec($ch);
	curl_close($ch);  

	if(!empty($ch_data)) {

		$i = 0;

		$json_data = json_decode($ch_data, true); //print_r(count($json_data)); exit();
		foreach($json_data as $data) {

			$post_title = $data['year'] . ' ' . $data['make'] . ' ' . $data['model'] . ' ' . $data['style'];

			$post = array(
				'post_type' => 'vehicle',
				'post_status' => 'publish',
				'post_title' => $post_title
			);

			$post_id = wp_insert_post($post);

			$vehicle_year = str_replace('.', '-', $data['year']);
			$vehicle_make = str_replace(' ', '-', strtolower($data['make']));

			if(!empty($post_id)) {

				// Update Year
				wp_set_object_terms($post_id, $vehicle_year, 'vehicle_year');

				// Update Make
				wp_set_object_terms($post_id, $vehicle_make, 'make');

				// Update Model
				update_post_meta($post_id, 'n4s-vehicle-model', $data['model']);

				// Update Style
				update_post_meta($post_id, 'n4s-vehicle-style', $data['style']);
			}

			$i++;

			if($i == 1000) {
				$wpdb->queries = array();
				$wp_actions = array();
				wp_cache_flush();
			}
		}
	}
}

This imports approx. 2500 – 6000 posts before breaking. Just over a minute. However, there are over 9000 posts that need to be inserted.

Any insight on this issue would be greatly appreciated.

Cheers

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