It takes too long time from clicking OK button on alert message box to the alert closed.

Sorry I can't show you the full code and create the sample file right away.
I wrote a simple code that only output the text on each page.
It took about 2 minutes.

//----------------------------------------------------
app.addMenuItem({ cName: "Test", cParent: "Edit",
	cExec: "process();",
	cEnable: "event.rc = (event.target != null);"
});

trustedActiveDocs = app.trustedFunction(function ()
                                        {
                                            app.beginPriv();
                                            var d = app.activeDocs;
                                            app.endPriv();
                                            return d;
                                        }
                                       )

function process()
{
	var d, i;
	
	d = trustedActiveDocs() ;
	if(d.length < 1)
	{
		return 0;
	}

	for (i=0; i < d.length; i++)
	{
		GetPageTextOnEachDoc(d[i]);
	}
	
	app.alert({nIcon:3, cTitle:"TEST", cMsg:"Done"});
}

//----------------------------------------------------
function GetPageTextOnEachDoc(acd)
{
	var PageNum, WdCnt;
	var i, j;
	var wd;
	var pageText;
	

	console.println("--------------------------------------");
	console.println("File Name = " + acd.documentFileName);
	console.println("--------------------------------------");

	PageNum = acd.numPages;
	for (i=0; i<PageNum; i++)
	{
		WdCnt = acd.getPageNumWords(i);
		pageText = "";
		
		if (WdCnt > 0)
		{
		    for (j=0; j<WdCnt; j++)
		    {
			    wd = acd.getPageNthWord(i, j, false);    			
			    pageText = pageText.concat(wd);
		    }
			console.println("Page " + i + " text = " + pageText);
			console.println("--------------------------------------");
		}	
	}		
}

I am sorry that there was a mistake in what I wrote.
The followings are what I have known now.

1. I have written that it takes 10 minutes clicking OK button on alert message box to the alert closed.
But, after the alert message box is shown, and after a short time,
Acribat falls into the state of not responding without clicking the OK button.
When the state of not responding is over, if I click the OK button, the alert message box closed soon.

2. The html file I used is a html file that there are 60 links to other html files in it.
This phenomenon can only be seen with the PDF file created from the html file using "Get entire site" setting at the moment.
If not using the "Get entire site" setting, the script works OK.

3. If I write the code in the console of javascript debugger and execute from the console, it works OK.

4. Kangxi radicals were irrelevant. This phenomenon occurs without this.

So... I think useing the "Get entire site" setting to create PDF is affecting.
Acrobat DC are doing something in the background??