pocketmine\Server::checkTickUpdates PHP Method

    private function checkTickUpdates($currentTick, $tickTime)
    {
        foreach ($this->players as $p) {
            if (!$p->loggedIn and $tickTime - $p->creationTime >= 10) {
                $p->close("", "Login timeout");
            } elseif ($this->alwaysTickPlayers) {
                $p->onUpdate($currentTick);
            }
        }
        //Do level ticks
        foreach ($this->getLevels() as $level) {
            if ($level->getTickRate() > $this->baseTickRate and --$level->tickRateCounter > 0) {
                continue;
            }
            try {
                $levelTime = microtime(true);
                $level->doTick($currentTick);
                $tickMs = (microtime(true) - $levelTime) * 1000;
                $level->tickRateTime = $tickMs;
                if ($this->autoTickRate) {
                    if ($tickMs < 50 and $level->getTickRate() > $this->baseTickRate) {
                        $level->setTickRate($r = $level->getTickRate() - 1);
                        if ($r > $this->baseTickRate) {
                            $level->tickRateCounter = $level->getTickRate();
                        }
                        $this->getLogger()->debug("Raising level \"{$level->getName()}\" tick rate to {$level->getTickRate()} ticks");
                    } elseif ($tickMs >= 50) {
                        if ($level->getTickRate() === $this->baseTickRate) {
                            $level->setTickRate(max($this->baseTickRate + 1, min($this->autoTickRateLimit, floor($tickMs / 50))));
                            $this->getLogger()->debug(sprintf("Level \"%s\" took %gms, setting tick rate to %d ticks", $level->getName(), round($tickMs, 2), $level->getTickRate()));
                        } elseif ($tickMs / $level->getTickRate() >= 50 and $level->getTickRate() < $this->autoTickRateLimit) {
                            $level->setTickRate($level->getTickRate() + 1);
                            $this->getLogger()->debug(sprintf("Level \"%s\" took %gms, setting tick rate to %d ticks", $level->getName(), round($tickMs, 2), $level->getTickRate()));
                        }
                        $level->tickRateCounter = $level->getTickRate();
                    }
                }
            } catch (\Throwable $e) {
                $this->logger->critical($this->getLanguage()->translateString("pocketmine.level.tickError", [$level->getName(), $e->getMessage()]));
                $this->logger->logException($e);
            }
        }
    }