New Post: Create more then 100 workbooks in a single Excel file.The code works fine. Is there any way to make this happen in less time like less then a minute?

function allStats(){


    $data['total']= $this->poster_model->numberTotalPiosters();
    $data['allPosters']= $this->poster_model->getAllPosters();require(APPPATH.'third_party/gapi.php');
    $ga =new gapi('xxx@xxxx','xxxxx');require(APPPATH.'third_party/PHPExcel.php');require(APPPATH.'third_party/PHPExcel/Writer/Excel2007.php');

    $objPHPExcel =newPHPExcel();
    $objPHPExcel->getProperties()->setCreator("Shire Congress");
    $objPHPExcel->getProperties()->setLastModifiedBy("Shire Congress");
    $objPHPExcel->getProperties()->setTitle("Shire Congress Posters Statistic");
    $objPHPExcel->getProperties()->setSubject("Shire Congress Posters Statistics");
    $objPHPExcel->getProperties()->setDescription("Statistics for Shire Congress Posters (".$data['allPosters'][$i]['PDF_Name'].")");

    $i=0;while($i <150){if($data['allPosters'][$i]['Translations']==0){if(time()< strtotime($data['allPosters'][$i]['Expiry_Date'])){
            $expiry = date('Y-m-d');
            $limit = round((strtotime($data['allPosters'][$i]['Expiry_Date'])- time())/86400);}elseif(strtotime($data['allPosters'][$i]['Expiry_Date'])== strtotime($data['allPosters'][$i]['Presentation_Date'])){
            $expiry = strtotime($data['allPosters'][$i]['Presentation_Date'])+86400;
            $limit =1;}else{
            $expiry = date('Y-m-d', strtotime($data['allPosters'][$i]['Expiry_Date']));
            $limit = round((strtotime($data['allPosters'][$i]['Expiry_Date'])- strtotime($data['allPosters'][$i]['Presentation_Date']))/86400);}

        $ga->requestReportData(
            xxxxxxxx,
            array('date','eventAction'),
            array('uniqueEvents'),
            array('eventAction'),'eventAction=='.base_url().'uploads/'.$data['allPosters'][$i]['PDF_Name'],
            date('Y-m-d', strtotime($data['allPosters'][$i]['Presentation_Date'])),
            $expiry,1,
            $limit);
        $download_stats = array();foreach($ga->getResults()as $result){
            $download_stats[$result->getDate()]= array('pageviews'=> $result->getUniqueEvents());}
        $data['downloads']= $ga->getUniqueEvents();
        $ga->requestReportData(
            xxxxxxx,
            array('date'),
            array('pageviews','uniquepageviews','visitors'),
            array('date'),'pagePath==/test/'.$data['allPosters'][$i]['Path'],
            date('Y-m-d', strtotime($data['allPosters'][$i]['Presentation_Date'])),
            $expiry,1,
            $limit);
    $stats = array();foreach($ga->getResults()as $result){
        $stats[]= array('origdate'=> $result->getDate(),'date'=> date('j F Y', strtotime($result->getDate())),'pageviews'=> $result->getPageviews(),'uniquepageviews'=> $result->getUniquePageviews(),'visitors'=> $result->getVisitors());}
        $data['page_views']= number_format($ga->getPageviews());
        $data['unique_page_views']= number_format($ga->getUniquePageviews());
        $data['visitors']= number_format($ga->getVisitors());
        $ga->requestReportData(
            xxxxxxxx,
            array('date'),
            array('pageviews'),
            array('date'),'pagePath==/test/'.$data['allPosters'][$i]['Path'].'/pdf-emailed.php',
            date('Y-m-d', strtotime($data['allPosters'][$i]['Presentation_Date'])),
            $expiry,1,
            $limit);
        $email_stats = array();foreach($ga->getResults()as $result){
            $email_stats[]= array('origdate'=> $result->getDate(),'date'=> date('j F Y', strtotime($result->getDate())),'pageviews'=> $result->getPageviews());}
        $data['email_views']= number_format($ga->getPageviews());
        $data['stats']= $stats;
        $data['email_stats']= $email_stats;
        $data['download_stats']= $download_stats;


        $objWorkSheet = $objPHPExcel->createSheet($data['allPosters'][$i]['Identifier']);

        $objWorkSheet->SetCellValue('A1','Date');
        $objWorkSheet->SetCellValue('B1','Unique page views');
        $objWorkSheet->SetCellValue('C1','Page views');
        $objWorkSheet->SetCellValue('D1','Visitors');
        $objWorkSheet->SetCellValue('E1','Downloads');
        $objWorkSheet->SetCellValue('F1','e-mails');
        $objWorkSheet->SetCellValue('G1','SMS');

        $a =2;foreach($stats as $stat){

            $objWorkSheet->SetCellValue('A'.$a, $stat['date']);
            $objWorkSheet->SetCellValue('B'.$a, intval($stat['uniquepageviews']));
            $objWorkSheet->SetCellValue('C'.$a, intval($stat['pageviews']));
            $objWorkSheet->SetCellValue('D'.$a, intval($stat['visitors']));


            $dd=$a;for($j=0;$j<=$total;$j++){//$data['sms'][$j]['from_number']//$data['sms'][$j]['date'];
                $datetocompare=date('d-m-Y', strtotime($stat['date']));if((strtotime($datetocompare))==(strtotime($data['sms'][$j]['date']))){if(isset($data['sms'][$j]['numbers_of_sms'])){
                $objWorkSheet->SetCellValue('G'.$a,($data['sms'][$j]['numbers_of_sms']));}else{
                $objWorkSheet->SetCellValue('G'.$a,0);}}
        $dd++;}if(isset($download_stats[$stat['origdate']])){
                $objWorkSheet->SetCellValue('E'.$a, intval($download_stats[$stat['origdate']]['pageviews']));}else{
                $objWorkSheet->SetCellValue('E'.$a,0);}if(isset($email_stats[$a-2])){
                $objWorkSheet->SetCellValue('F'.$a, intval($email_stats[$a-2]['pageviews']));}else{
                $objWorkSheet->SetCellValue('F'.$a,0);}

            $a++;}

        $objWorkSheet->setTitle($data['allPosters'][$i]['Identifier']);

    $i++;}}
    $objWriter =newPHPExcel_Writer_Excel2007($objPHPExcel);
    $objWriter->save('uploads/allposters/'.md5($i).'.xlsx');}