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Subject: Re: [wsrp] [wsrp-wsia] [change request #249] Class name length impacton performance

I agree with Rich on the clarity thing. However, I wouldn't have a problem with shortening the prefix from 'portlet-' to 'p-' and keeping the rest of the class name the same.

Mike, it's kind of funny that the document size appears to be an issue when you are considering encoding the navigational state of all the portlets in the page into every URL in the page. Just kidding ;)


Rich Thompson wrote:

To keep this reasonably in perspective, files with CSS definitions make wonderful items for caching and so the download time impact is lessened significantly. Also, the length of the class names is a minor part of the length of the CSS file.

The class names in the content is unlikely to add over a k in overall file size and therefore be a minor portion of the performance question.

Net: Class names should be as short as is reasonable as they do impact End-User performance, but clarity of what the class is for should not be sacrificed in order to shorten the name.

Rich Thompson

Rich Thompson/Watson/IBM@IBMUS

03/26/2003 10:09 AM

        To:        wsrp@lists.oasis-open.org
        Subject:        [wsrp] [wsrp-wsia] [change request #249] Class name length impact on performance

This came from an internal review by our "performance police":

Document: Spec 0.92

Section: 10.5 CSS Style defintions

Page/Line: 72/15

Requested by: Michael Freedman

Old Text:

New Text:
shorter class names


Please strongly consider using *much* shorter names for these CSS elements.  We already have network latency/transmission issues due to the size of our existing CSS files because they cannot utilize browser compression.

Long names in the CSS definitions lead to large CSS files and noticably slower download times.  Additionally the "source" HTML pages that refer to the CSS's will be noticably larger as a result of these long names.

To give a concrete example, consider a centralized Portal server configuration, ie HQ/MOC, with a remote client in Singapore, operating over a fairly standard 200ms latency network.  Transmitting a 10k CSS file will cause ~6 round trips due to network startup costs.

Overall loss due to network Round trips = 220 * 6 or ~1.3s

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