OpenNebula

Hi

This is likely becasue of the ruby gems/versions. Can you send the list of gems installed and ruby version that you are using?

ruby 2.1.5p273 (2014-11-13) [x86_64-linux-gnu] - from Debian 8.2

gem list - part from Debian 8, others from ruby repository

bigdecimal (1.2.4)
daemons (1.1.9)
eventmachine (1.0.3)
hiera (1.3.4)
io-console (0.4.2)
json (1.8.1)
minitest (4.7.5)
mysql (2.9.1)
net-ldap (0.8.0)
nokogiri (1.6.3.1)
ox (2.1.1)
parse-cron (0.1.4)
pg (0.17.1)
polyglot (0.3.5)
psych (2.0.5)
rack (1.5.2)
rack-protection (1.5.2)
rake (10.3.2, 10.1.0)
rdoc (4.1.0)
ruby-shadow (2.3.4)
ruby-termios (1.0.0)
safe_yaml (1.0.3)
sequel (4.15.0)
sequel_pg (1.6.10)
sinatra (1.4.5)
test-unit (2.1.5.0)
thin (1.3.1)
tilt (1.4.1)
treetop (1.6.3)
uuidtools (2.1.4)

Last moment I added ruby-ox, but it didn't improve.

Profiling in a VM that should be slower than you machine I get around 0.3 seconds for a onehost list without hosts. Most of the time is requiring libraries:

 %self      total      self      wait     child     calls  name
  2.39      0.268     0.007     0.000     0.261      345  *Kernel#gem_original_require

Can you send me a profile output of the same command? To do this:

apt-get install ruby-devel build-essential
gem install ruby-prof
ruby-prof $(which onehost) list