read.href = 'speedtest1.html?flags='+comma;
        eLinkWasmfs.setAttribute('target', 'speedtest1-wasmfs-'+comma);
        eLinkWasmfs.href = 'speedtest1-wasmfs.html?flags='+comma;
        eLinkKvvfs.setAttribute('target', 'speedtest1-kvvfs-'+comma);
        eLinkKvvfs.href = 'speedtest1.html?vfs=kvvfs&flags='+comma;
    };
    eFlags.addEventListener('change', updateSelectedFlags );
    {
        const flags = Object.create(null);
        /* TODO? Flags which require values need custom UI
           contr