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I noticed that PHP has recently over taken It also looks like PHP is growing faster than even just ".net" or java tags. It would be cool if SO would show the rate of change or rather the 1st derivative of tags. It would also be cool to sort all tags by the rate at which they are growing.

I think that this will produce more accurate statistics than TIOBE.

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Yay! Tag calculus! – mmyers Mar 5 '10 at 20:29
@mmyers: Int(ASP.NET, 0..42) = ? – Jon Seigel Mar 5 '10 at 20:39
My heart hopes that tags like subjective and career-development are waning, but my brain knows better. – gnostradamus Mar 5 '10 at 21:26
@gnovice: Your brain deceives you.… – Greg Hewgill Mar 7 '10 at 8:58
@Greg: Looks promising, but since it's a relative percentage it could indicate 2 things. Either the subjective questions are being asked less, or other questions are being asked more. – gnostradamus Mar 7 '10 at 18:50
@gnovice: or, subjective questions aren't actually being tagged as such. :) – Greg Hewgill Mar 7 '10 at 19:23
up vote 6 down vote accepted

I direct you to the Stack Overflow Tag Trends page, which shows the proportion of questions per tag relative to the total number of questions, graphed over time. The data available today is the latest (March dump, which includes up to the end of February 2010). The final week sometimes shows some glitches due to it usually being a partial week.

PHP is indeed growing quickly.

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cool! I wish this was expanded. – Rook Mar 5 '10 at 21:58
@user142380: expanded to what? If you're interested in specific comparisons, I can certainly add them. – Greg Hewgill Mar 5 '10 at 23:13
You are comparing a good set of tags, I can't think of better ones off hand. It would be nice if this was an integrated feature that would allow you to compare arbitrary tags. Perhaps you could add multiple tags to better extrapolate different information like is PHP usage growing faster on Windows, Linux, Solaris or BSD? – Rook Mar 8 '10 at 20:46
@user142380: see the latest version, you can now choose your own tags to compare:… – Greg Hewgill Mar 8 '10 at 21:04

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