- From: Kartikaya Gupta <lists.whatwg@stakface.com>
- Date: Tue, 10 Nov 2009 18:55:57 +0000
If you have a page like this: <!DOCTYPE HTML> <html><body> <font size="2" face="Verdana"> <p align="left">Some text <font size="2" face="Verdana"> <p align="left">Some text </body></html> according to the HTML5 parser rules, I believe this should create a DOM with 3 font elements that looks something like this: <!DOCTYPE HTML><HTML><HEAD></HEAD><BODY> <FONT face="Verdana" size="2"> <P align="left">Some text <FONT face="Verdana" size="2"> </FONT></P><P align="left"><FONT size="2" face="Verdana">Some text </FONT></P></FONT></BODY></HTML> However, if you add extend the original source with another font/p combination, like so: <!DOCTYPE HTML> <html><body> <font size="2" face="Verdana"> <p align="left">Some text <font size="2" face="Verdana"> <p align="left">Some text <font size="2" face="Verdana"> <p align="left">Some text </body></html> You end up with a DOM which has 6 font elements: <!DOCTYPE HTML><HTML><HEAD></HEAD><BODY> <FONT face="Verdana" size="2"> <P align="left">Some text <FONT face="Verdana" size="2"> </FONT></P><P align="left"><FONT size="2" face="Verdana">Some text <FONT face="Verdana" size="2"> </FONT></FONT></P><P align="left"><FONT face="Verdana" size="2"><FONT size="2" face="Verdana">Some text </FONT></FONT></P></FONT></BODY></HTML> .. and so on. In general the number of font elements in the DOM grows polynomially, with the result that pages like [1] and [2] end up with hundreds of thousands of font elements. I haven't even been able to successfully parse [3] with either our own HTML5 parser or the one at validator.nu, it just gobbles up all available memory and asks for more. Is this behavior expected, or is it a bug in the spec? Obviously shipping browsers don't demonstrate this behavior (nor does Firefox's HTML5 parser - see bugzilla 525960) so I'm wondering if the spec could be modified to not have this polynomial-growth behavior. Cheers, kats [1] http://www.miprepzone.com/past.asp?Category=%27news%27 [2] http://info4.juridicas.unam.mx/ijure/tcfed/8.htm?s= [3] http://info4.juridicas.unam.mx/ijure/tcfed/1.htm?s=
Received on Tuesday, 10 November 2009 10:55:57 UTC