VK bot answers every other time, how to speed up answers?

Question

PHP

Wrote a bot that works well in the 1st conversation, but after being added to a couple of conversations. then the load went and the messages began to not reach, the answers through time, how to speed it up?
Code example :

if ($message == 'а') {
$vk->sendMessage($peer_id, "б");
}

P/s Hosting is good...

Answer 1

It is possible that the hosting is good, but perhaps the hosting memory is full, or the server itself is overloaded, digging for poison, close the processes.