# ./script/about with ruby 1.9.1

**URL:** <https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871>\
**Category:** Rails\
**Created:** [July 10, 2009, 2:25pm UTC](https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871 "2009-07-10T14:25:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [July 10, 2009, 2:25pm UTC](https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871/1 "2009-07-10T14:25:17Z")

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Hi In my machine there is Ruby1.8.6 ,1.9.1 and rails 2.3.2 And I created  
a new project using Ruby1.9.1 and rails 2.3.2 But when did  
./script/about it shows  
Ruby version 1.8.6 (i386-linux)  
RubyGems version 1.3.1

Why this happens

Thanks in advance  
Sijo

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<div class="post-metadata">

**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [July 10, 2009, 3:07pm UTC](https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871/2 "2009-07-10T15:07:19Z")

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On Jul 10, 1:25 pm, Sijo Kg [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Hi In my machine there is Ruby1.8.6 ,1.9.1 and rails 2.3.2 And I created  
> a new project using Ruby1.9.1 and rails 2.3.2 But when did  
> ./script/about it shows  
> Ruby version 1.8.6 (i386-linux)  
> RubyGems version 1.3.1
> 
> Why this happens

If you have multiple versions of ruby installed then how you choose  
which one is used may vary. the scripts that come with ruby usually  
have  
#!/usr/bin/env ruby  
which searches $PATH in the usual way. If for example you have ruby  
1.9 installed in such a way that ruby19 is the ruby 1.9 interpreter  
(and irb19 the 1.9 version of irb etc.) then you need to either change  
the shebang line or invoke ruby explicitly (ie ruby19 script/about)

Fred

Fred

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<div class="post-metadata">

**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [July 11, 2009, 6:04am UTC](https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871/3 "2009-07-11T06:04:29Z")

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Hi  
Thanks for your it worked Now to test the performance difference  
between Ruby1.9.1 and ruby 1.8.6 with rails 2.3.2 what I did is  
Created a rails projects using 1.9.1 and 1.8.6 Then created a model and  
migrated it to the db using 1.8.6 Ruby+rails Now from the project  
created using the 1.9.1 I just make the model only  
Now connected this too to the same db For example my model is  
School with only one attribute name Then I open console for both the  
versions and gave

School.find :all #This has 8 records

And the result I got is

School Load (0.6ms) SELECT \* FROM “schools” #from project 1.9.1  
School Load (0.6ms) SELECT \* FROM “schools” /3from project  
1.8.6

```
 Could you please tell where is the performance difference I cant 

```

understand since it both takes same time How can I measure the actual  
performance difference using ruby 1.9.1 with rails 2.3.2 and ruby1.8.6  
with rails 2.3.2

Thanks  
Sijo

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<div class="post-metadata">

**Author:** ![sijo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/da6949/32.png) [@sijo](https://www.ruby-forum.com/u/sijo)\
**Post date:** [July 11, 2009, 6:36am UTC](https://www.ruby-forum.com/t/script-about-with-ruby-1-9-1/171871/4 "2009-07-11T06:36:19Z")

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Hi, the performance you’ll see is for Ruby code execution. You can  
try running the Rails tests or the Ruby spec tests. Also, you can try  
using Apache Bench with concurrency greater than 4 targeting pages  
which require more Ruby code execution paths.

Good luck,

-Conrad

Sent from my iPhone

On Jul 10, 2009, at 9:04 PM, Sijo Kg \<rails-mailing-list@andreas-