Comments on: How to find image sizes in rails without image science http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/ A blog about Ruby, Rails and other tech. Mostly. Thu, 02 Sep 2010 19:56:26 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: photoshop restoration and retouching http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/comment-page-1/#comment-5149 photoshop restoration and retouching Tue, 11 Aug 2009 05:14:44 +0000 http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/#comment-5149 This is absolutely great! Thanks!! This is absolutely great! Thanks!!

]]> By: Pennysmalls http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/comment-page-1/#comment-170 Pennysmalls Tue, 19 Aug 2008 07:05:46 +0000 http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/#comment-170 [...] do not reside on our rails application server.  I have previously written about how to use the GD library to find image sizes, but this requires fetching the whole file and having it available in the local file [...] [...] do not reside on our rails application server.  I have previously written about how to use the GD library to find image sizes, but this requires fetching the whole file and having it available in the local file [...]

]]> By: Damien Tanner http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/comment-page-1/#comment-12 Damien Tanner Mon, 14 Jan 2008 17:04:08 +0000 http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/#comment-12 Superb! Superb!

]]> By: Stephen Sykes http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/comment-page-1/#comment-8 Stephen Sykes Thu, 27 Dec 2007 07:50:33 +0000 http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/#comment-8 Mike - rubyinline is smart - it compiles once and caches the compiled code. It usually does this into a directory called .ruby_inline in your home, although it's configurable (look at the ENV['INLINEDIR'] setting at the top of this code). I have had good results with performance by using inline C code - maybe 10 times faster that the same ruby. But the above example was not done for performance - I used gd for compatibility with my architecture (better than image science) and in order not to have to use a large package like RMagick for such a small task. Mike – rubyinline is smart – it compiles once and caches the compiled code. It usually does this into a directory called .ruby_inline in your home, although it’s configurable (look at the ENV['INLINEDIR'] setting at the top of this code).

I have had good results with performance by using inline C code – maybe 10 times faster that the same ruby. But the above example was not done for performance – I used gd for compatibility with my architecture (better than image science) and in order not to have to use a large package like RMagick for such a small task.

]]> By: Mike http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/comment-page-1/#comment-7 Mike Wed, 26 Dec 2007 23:41:43 +0000 http://pennysmalls.com/2007/12/26/how-to-find-image-sizes-in-rails-without-image-science/#comment-7 Wow I have never realized you can use C code inside Ruby! I wonder, what about the performance of ImageInfo? Does it needs to get compiled every time a new instance is created, or it is compiled once and then can be used without performance decrease for compilation? Wow I have never realized you can use C code inside Ruby!
I wonder, what about the performance of ImageInfo? Does it needs to get compiled every time a new instance is created, or it is compiled once and then can be used without performance decrease for compilation?

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