[Ironruby-core] IR WPF Project, ActiveRecord sqlite3-ironruby writes slow, reads fast

Sick Boy sb at dev-heaven.net
Sat Jan 8 06:53:05 EST 2011

I went out of my way and decided to have a look at updating the SQlite dll.
It seems the interface has changed since sqlite3-ironruby gem release.
I have downloaded and put the Community.CsharpSqlite.dll in the native folder:http://code.google.com/p/csharp-sqlite/downloads/list?can=1&q=&colspec=Filename+Summary+Uploaded+ReleaseDate+Size+DownloadCount
Then I have adjusted driver.rb to: http://pastebin.com/diff.php?i=7e522Rvs
Most things seem to just work, and it's blazing fast now, about as fast as Ruby 1.9.2's sqlite3 performance!
I thought i'd let you know in case experiencing similair issues :-)

From: sb at dev-heaven.net
To: ironruby-core at rubyforge.org
Date: Thu, 6 Jan 2011 15:51:46 +0000
Subject: [Ironruby-core] IR WPF Project, ActiveRecord sqlite3-ironruby writes slow, reads fast

I am since some weeks working with IronRuby.I do not consider myself a great programmer in neither Ruby or .NET, yet I really love Ruby, and in these past few weeks IronRuby and .NET in general has really grown on me; very powerful!So first; my gratitude for this amazing product, thanks to all who make this possible!
My project's available @ Github: https://github.com/sickboy/six-updater-gui
My current issue is that SQLite writes seem to take at least 0.7 seconds per write.So if I update 100 records at once in 1 query, it will take ~0.8s.But also if I update 1 record, it will take ~0.7s..In comparison, the same actions with mingw Ruby 1.9.2 (from RubyInstaller.org), these writes take only about 0.005s
Reads seem to be okay.
Is this a known problem? Is there anything that can be done about this?Do others see these long delays as well? How about msSQL (/Express)?

Not sure if I should create a seperate mail thread for this;The second problem i'm having is that when I load a database model with ActiveRecord 2.3.8 into a BindingList, and that to a BindingSource, and assign it to a DataGridView, everything is fine.When I use ActiveRecord 3.03, I get "A singleton class has no underlying system type". Unless I don't add records to the binding list, before assigning the BindingSource as data_source of the DataGridView, and instead, add records to the binding list after assigning the data_source.I am not sure how I should debug this problem.

Lastly I have the feeling (based on timing results in my logs) that processing IronRuby scripts is faster when they run through the ir.exe interpreter, than when they are executed in an engine from within a c# app.Could that be because certain optimizations are enabled in ir.exe, or something similair?

Thanks for your time! 		 	   		  

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