When many plugins are installed, "Admin" > "Plugins" page is very slow. In case of worst, we can not operate page.
This is caused by version check of plugins. I hope that check code is stoped by some admin option
Example source (qa-include/qa-page-admin-plugins.php [around L151]):
if (strlen(@$metadata['version']) && strlen(@$metadata['update'])) {
if(qa_opt('version_check')) {
$elementid='version_check_'.md5($plugindirectory);
$updatehtml='(<span id="'.$elementid.'">...</span>)';
$qa_content['script_onloads'][]=array("qa_version_check(".qa_js($metadata['update']).", 'Plugin Version', ".qa_js($metadata['version'], true).", 'Plugin URI', ".qa_js($elementid).");"
);
}
} else
...