Request too heavy - php

Question

I try to retrieve for each region the number of cities with current events.
So I started doing this:
$regionCities = [];
foreach ($regions as $region) {
$regionCities[$region->getId()] = $cityRepository->getCitiesByRegion($region);
}
dump($regionCities);
$regionCitiesNumber = [];
foreach ($regionCities as $index => $region) {
foreach ($region as $city) {
$regionCitiesNumber[$index] = count($city->getCurrentEvents());
}
}
My dump returns me this:
dump
The problem is, it crashes my script, and I suddenly get a blank page when I dump regionCitiesNumber.
getCurrentEvents is a method of my City entity that will retrieve all current events.
public static function createCurrentEventsCriteria(): Criteria
{
return Criteria::create()
->where(Criteria::expr()->gte('endDate', new DateTime('00:00:00')))
->orderBy(['id' => 'DESC'])
;
}
public function getCurrentEvents(): Collection
{
$criteria = EventRepository::createCurrentEventsCriteria();
return $this->events->matching($criteria);
}

Answer 1

Use error logs or try using "Try Catch" wrapper
$regionCities = [];
foreach ($regions as $region) {
$regionCities[$region->getId()] = $cityRepository->getCitiesByRegion($region);
}
//dump($regionCities);
try {
$regionCitiesNumber = [];
foreach ($regionCities as $index => $region) {
foreach ($region as $city) {
$regionCitiesNumber[$index] = count($city->getCurrentEvents());
}
}
} catch (\Throwable $t) {
dd($t);
}

Answer 2

So I tried:
return $this->events->matching($criteria)->count();
And I dumped on regionCitiesNumber, it gave me a totally wrong result:
For example for the ARA region, I end up with 0 as a result while there are 1895 events distributed over all the departments ...
As a result, most regions result in 0, sometimes 1, sometimes 2 ...
In addition, it takes a long time to load my page, isn't there a softer solution?