Rails app slower on a new Dell with Ubuntu than on an old Mac

[Osledy Bazó]

Hello people, I have a problem but im not sure if is a problem at all.

I've been working in a client project using a macbook pro for two years now.

The project is a rails 2.1.2 app that we are upgrading, it has a lot of tests unit/functional/integration/cucumber

The complete test suite runs slower on a new Dell manchine that on the old Mac. Is that normal?

The specs for the mac are:

2008 macbook pro, lion 10.7.2

8gb ram, 2.53Ghz Core2Duo, 250hd

The specs for the dell are:

New Dell xps 15 (new model that came out this year)

8gb ram, IntelCore™ i7-3632QM, 720hd

It has Ubuntu 12.04 64bit.

I have installed ruby ree with rvm in both laptops

they have the same gems versions managed with bundler

The mac the tests time:

unit

real 9m23.025s

user 3m42.044s

sys 1m40.441s

cucumber

real 13m3.981s

user 8m46.322s

sys 1m24.287s

The dell the tests time:

unit

real 35m4.003s

user 2m52.155s

sys  0m58.388s

cucumber

real 28m54.349s

user 6m32.773s

sys  0m44.751s

Dell times are slow, is there something im missing? is this normal?

[Jordon Bedwell]

How are you compiling it? What are the packages you used to compile
it? What version of Ubuntu?

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[Osledy Bazó]

To compile ruby? rvm does that see pastie http://pastie.org/5342877

Im using ubuntu 12.04