Ruby installed on Ubuntu 10.10 slow on one machine but not other
- by Aaron Jensen
I have a machine that was provisioned several months ago. RVM was used to install ruby 1.9.3-p125 as well as 1.9.3-p125-perf. When I compared raw ruby performance to another identical machine the older machine smoked them.
For example:
================================================================================
With in-block needle calculation
================================================================================
Rehearsal ----------------------------------------------
detect 3.790000 0.000000 3.790000 ( 3.800895)
each 2.410000 0.000000 2.410000 ( 2.420860)
any 3.960000 0.000000 3.960000 ( 3.972099)
include 1.440000 0.000000 1.440000 ( 1.442862)
------------------------------------ total: 11.600000sec
vs
================================================================================
With in-block needle calculation
================================================================================
Rehearsal ----------------------------------------------
detect 10.740000 0.000000 10.740000 ( 10.769366)
each 6.080000 0.010000 6.090000 ( 6.106323)
any 10.600000 0.000000 10.600000 ( 10.641606)
include 4.160000 0.000000 4.160000 ( 4.171530)
------------------------------------ total: 31.590000sec
I attempted to reinstall 1.9.3-p125 with rvm on the fast machine and that ruby is now slow. It's as if something changed in RVM, or I installed some package that made compiled versions of ruby perform significantly worse.
I know this is a tough question to answer, but what things should I look into in order to track down why the performance has suffered so much?
edit
I just attempted to install with ruby-build and the version installed was fast. Something rvm is doing to build it in my environment is slow.
