Can I check each of my courses for a certain folder more efficiently than this?

Hi, I am checking all the courses in my Canvas database to see which ones have a certain folder. Let's call this folder "BB_Direct."

At the moment, using cUrl requests like below, I check the accounts/number/courses endpoint to retrieve all the courses:

  $loop = 1; //increments with each loop
  $validReturn = true;

while($validReturn) {
  curl_setopt_array($curl, [
    CURLOPT_RETURNTRANSFER => true,
    CURLINFO_HEADER_OUT => true,
    CURLOPT_URL => "https://my.test.instructure.com/api/v1/accounts/$loop/courses?by_subaccounts[100]&per_page=100",//?by_subaccounts[95]&per_page=100/",//'https://ucc.test.instructure.com/api/v1/courses',
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_SSL_VERIFYPEER => true,
    CURLOPT_HTTPHEADER => $headers,
    CURLOPT_CUSTOMREQUEST, 'GET',
    CURLOPT_RETURNTRANSFER, true
  ]);
 $resp = curl_exec($curl);
  $data = json_decode($resp, true);
  if (array_key_exists("errors", $data)) { //assuming that there are NO valid pages after the latest retrieved one that returns "error"
    $validReturn = false;
    echo "Invalid page found. Ending after loop $loop</br>";
  }
  else {
    echo "Loop $loop <br>";
    //dd($data);
  //dd($data);
    foreach ($data as $d) {
      if((array_key_exists("id", $d)) && (self::hasBBDirect($d["id"]))) { //important line
        echo "BB_Direct folder FOUND in course " . $d["id"] . "</br>";
      } else {
        echo "No BB_Direct folder found in course " . $d["id"] . "<br>";
      }
    }
    $loop++;
  }

See the "self::hasBBDirect($d["id"])" line? That directs to a helper function to check if any courses under the returned course ID have the folder I'm looking for:

   public function hasBBDirect($courseID) {
       $token = "insert_token_here";
       $headers = ['Authorization: Bearer ' . $token];
       $curl = curl_init();
       $url = "https://my.test.instructure.com/api/v1/courses/$courseID/folders/by_path/BB_Direct"; //"BB_Direct" = the folder I'm looking for

       curl_setopt_array($curl, [
  CURLOPT_RETURNTRANSFER => true,
  CURLINFO_HEADER_OUT => true,
  CURLOPT_URL => $url,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_SSL_VERIFYPEER => true,
  CURLOPT_HTTPHEADER => $headers,
  CURLOPT_RETURNTRANSFER, true
]);

       $resp = curl_exec($curl);
       $data = json_decode($resp, true);
       if(array_key_exists("errors", $data)) {
         return False;
       } else { //presumably, the given course has a BB_Direct folder after all then
         return True;
       }
 }

Now, the code I have listed works, it does what I want it to do. But the dataset I am working on has 7000 entries in it, so this takes a lot of time to compute. My question is, how can I OPTIMISE this? Can I find a certain folder in my list of courses any more efficiently?

Any thoughts anyone could lend me would be greatly appreciated