Optimize your images when uploaded with IMCE

optimize.php

<?php
/**
* You need to have module imageapi_optimize enabled
*/

function HOOK_file_presave($file) {
  // only temporary files from IMCE
  if ($file->source === 'imce' && $file->status == 0) {

    if ($wrapper = file_stream_wrapper_get_instance_by_uri($file->uri)) {
      $path = $wrapper->realpath();
      $fs = filesize($path);
      _imageapi_optimize_optimize(image_load($path), $path);

      clearstatcache($path);
      $nfs = filesize($path);


      watchdog('PHP', "%percentage% reduction on %filename (from %filesize to %filesize_new)", array('%percentage' => round(100-$nfs/$fs*100), '%filename' => $file->uri,'%filesize' => $fs, '%filesize_new' => $nfs), WATCHDOG_INFO);
    }
  }
}