如何高效地将成员分组并根据评分进行排序？

public function groupmembers($peoplelist, $groupsize) {
    $count = count($peoplelist);
    $result = [];

    foreach ($peoplelist as $i => $imember) {
        for ($j = $i + 1; $j < $count; $j++) {
            // ... (此处应补充根据分组大小和评分进行分组的逻辑) ...
        }
    }
    return $result;
}

public function optimizeGrouping($reference, $preSelected, $score) {
    $scoreMap = [];
    $grouped = [];

    foreach ($reference as $item) {
        $list = $item['list'];
        $matchCount = 0;
        foreach ($list as $member) {
            if (in_array($member, $preSelected)) {
                $matchCount++;
            }
        }

        // 使用匹配数量作为评分
        $scoreMap[$matchCount] = $item;
    }

    krsort($scoreMap); // 按评分降序排序

    // 按评分排序后，逐组剔除重复成员
    foreach ($scoreMap as $iItem) {
        $list = $iItem['list'];
        foreach ($list as $iMember) {
            if (!in_array($iMember, $grouped)) {
                $grouped[] = $iMember;
            }
        }

        // 如果已分组成员数量等于预选成员数量，则找到最优解
        if (count($grouped) == count($preSelected)) {
            return $grouped;
        }
    }

    return []; // 未找到最优解
}