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

Tomas Matousek Tomas.Matousek at microsoft.com
Sat Jan 8 19:27:03 EST 2011


The driver should convert Int64 to Bignum, using e.g. Kernel#Integer:

>>> i64 = System::Int64.new(1000000000000)
=> 1000000000000 (Int64)
>>> Integer(i64)
=> 1000000000000
>>> Integer(i64).class
=> Bignum
>>>

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Sick Boy
Sent: Saturday, January 08, 2011 3:58 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] IR WPF Project, ActiveRecord sqlite3-ironruby writes slow, reads fast

Only problem i've ran into with this method for now has been the usage of System::Int64 for Primary keys.

In a join table it was storing the yaml representation of the Int64 object instead of the proper Integer value,

as a quick patch I've applied the following but i'm sure there is a better safer way;

class System::Int64

 def to_i; self.to_s.to_i; end

end


________________________________
From: sb at dev-heaven.net
To: ironruby-core at rubyforge.org
Date: Sat, 8 Jan 2011 11:53:05 +0000
Subject: Re: [Ironruby-core] IR WPF Project, ActiveRecord sqlite3-ironruby writes slow, reads fast

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
Hello,

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!

_______________________________________________ Ironruby-core mailing list Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org> http://rubyforge.org/mailman/listinfo/ironruby-core

_______________________________________________ Ironruby-core mailing list Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org> http://rubyforge.org/mailman/listinfo/ironruby-core
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://rubyforge.org/pipermail/ironruby-core/attachments/20110109/2ed40e51/attachment-0001.html>


More information about the Ironruby-core mailing list