使用完整网址时，PHP file_get_contents非常慢

I am working with a script (that I did not create originally) that generates a pdf file from an HTML page. The problem is that it is now taking a very long time, like 1-2 minutes, to process. Supposedly this was working fine originally, but has slowed down within the past couple of weeks.I am working with a script (that I did not crea