Laravel help for optimize command script - laravel

Question

I'm working with Lumen framework v5.8 (it's the same as Laravel)
I have a command for read a big XML (400Mo) and update datas in database from datas in this file, this is my code :
public function handle()
{
$reader = new XMLReader();
$reader->open(storage_path('app/mesh2019.xml'));
while ($reader->read()) {
switch ($reader->nodeType) {
case (XMLREADER::ELEMENT):
if ($reader->localName === 'DescriptorRecord') {
$node = new SimpleXMLElement($reader->readOuterXML());
$meshId = $node->DescriptorUI;
$name = (string) $node->DescriptorName->String;
$conditionId = Condition::where('mesh_id', $meshId)->first();
if ($conditionId) {
ConditionTranslation::where(['condition_id' => $conditionId->id, 'locale' => 'fr'])->update(['name' => $name]);
$this->info(memory_get_usage());
}
}
}
}
}
So, I have to find in the XML each DescriptorUI element, the value corresponds to the mesh_id attribute of my class Condition.
So, with $conditionId = Condition::where('mesh_id', $meshId)->first(); I get the Condition object.
After that, I need to update a child of Condition => ConditionTranslation. So I just get the element DescriptorName and update the name field of ConditionTranslation
At the end of the script, you can see $this->info(memory_get_usage());, and when I run the command the value increases each time until the script runs very very slowly...and never ends.
How can I optimize this script ?
Thanks !
Edit : Is there a way with Laravel for preupdate multiple object, and save just one time at the end all objects ? Like the flush() method of Symfony

Answer 1

There is a solution with ON DUPLICATE KEY UPDATE
public function handle()
{
$reader = new XMLReader();
$reader->open(storage_path('app/mesh2019.xml'));
$keyValues = [];
while ($reader->read()) {
switch ($reader->nodeType) {
case (XMLREADER::ELEMENT):
if ($reader->localName === 'DescriptorRecord') {
$node = new SimpleXMLElement($reader->readOuterXML());
$meshId = $node->DescriptorUI;
$name = (string) $node->DescriptorName->String;
$conditionId = Condition::where('mesh_id', $meshId)->value('id');
if ($conditionId) {
$keyValues[] = "($conditionId, '".str_replace("'","\'",$name)."')";
}
}
}
}
if (count($keyValues)) {
\DB::query('INSERT into `conditions` (id, name) VALUES '.implode(', ', $keyValues).' ON DUPLICATE KEY UPDATE name = VALUES(name)');
}
}