("head")[0].appendChild(s3);' +
        'const s4 = document.createElement("script");' +
        's4.src = "empty_script.js?id=9";' +
        's4.defer = true;' +
        'document.getElementsByTagName("head")[0].appendChild(s4);' +
        '</scr' + 'ipt>';
    iframe = document.getElementById('frameContext');
    iframe.contentWindow.document.write(iframe_content);
}
function onload_test() {
    const context = new PerformanceContext(iframe.contentWindow.performance);
    const entries = context.getEntrie