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Re: more xhtml 2.0 comments

From: John Lewis <lewi0371@mrs.umn.edu>
Date: Thu, 17 Apr 2003 06:21:26 -0500
Message-ID: <135123693624.20030417062126@cda.mrs.umn.edu>
To: www-html@w3.org

Etan wrote on Thursday, April 17, 2003 at 3:47:44 AM:

>> 7. deprecating h1-h6 is a performance hit for web browsers.
> [...]
>> that's _considerably_ slower

> Well, how much slower is it?

I did a very unscientific little test with two mostly identical 138 KB
documents containing a great number of h1-h6 and a great number of
section+h equivalents (in six level groups, to match the h1-h6
functionality). h1-h6 were matched with simple selectors and section+h
were matched with child selectors.

I tested with Opera 7.1 (Win32) on a 233 MHz K6.

I did notice a significant performance difference in rendering the
documents. The h1-h6 document took approximately three seconds to
render, and the section+h document took approximately five seconds to
render. That's about 1.7 times as long.

(Your results will vary. I only tested with one computer and one
version of one browser.)

> Is it worth cluttering the language to cater to today's software?

While I would prefer leaving h1-h6 out, since the performance hit
isn't likely to be often noticable even today, h1-h6 might as well be
left in and deprecated. I think most people will choose to use
section+h instead.

However, after typing "section" a few too many times I'm open to the
idea of the element name being shortened.

-- 
John Lewis
Received on Thursday, 17 April 2003 07:21:56 GMT

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