[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Data streams
As I said initially, larger data elements do change the ratios. To go to the opposite extreme, large blocks of text can actually be handled MORE efficiently with XML than CSV. On the other hand, the larger the attributes and other tag "labels," the greater the ratio, and visa versa. So, all I'm saying is that there are times when XML make more sense than CSV, and certain situations make CSV superior. No one solution is right for all circumstances. By choosing the method that fits most sensibly with the data will help alleviate some of the XML backlash. A good seems to be that, everything else being equal, (a) the longer the tags or the shorter the data elements, the less sense it makes to transport the data via XML and (b) the shorter the tags or the longer the data elements, the more sense it makes to transport the data via XML. Anyone disagree? Steve -----Original Message----- From: Peter Hunsberger [mailto:peter.hunsberger@g...] Sent: Monday, December 06, 2004 5:24 PM To: Stephen E. Beller Cc: xml-dev@l... Subject: Re: Data streams On Mon, 06 Dec 2004 16:35:48 -0500, Stephen E. Beller <sbeller@n...> wrote: > In consideration of Elliotte's reply, I went back and looked at the XML file > Excel generated. Here's what I found ... > > Every one of the XML data elements had this tagging structure: > <Row> > <Cell><Data ss:Type="Number">1</Data></Cell> > </Row> > > In contrast, the CSV had this structure: 1, > > That's a 50 characters to 1 difference for each data element. > > I doubt that all those XML tags are necessary if you're rendering the data > in something other than a spreadsheet. But if you are planning to use a > spreadsheet, then the 50 to 1 ratio is valid, it seems to me. Use the number 10, now the difference is 51 to 2 or a ratio of ~26 to 1. Use the number 100 and the ratio is 52 to 3 or ~17 to 1. Six digits? 56 to 6 or ~10 to 1. Now add multiple columns of data (as any realistic example would do) and the ratio falls even farther. <snip/> > > So, this benchmark test still points to a huge difference in file size and > in unzipping and parsing time when you compare a large data array in CSV > compared to XML. Maybe, maybe not, the bench mark needs to be more realistic before you draw any conclusions about "huge". -- Peter Hunsberger
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