This was:

ruby 1.8.4 (2005-12-24) [x86_64-linux]
vs
ruby 1.8.6 (2008-08-11 patchlevel 287) [x86_64-linux]
Ruby Enterprise Edition 20090421

on Ubuntu Dapper, using Passenger with Apache.

I used the puppet-test script in the ext/ directory to simulate 50
simultaneous runs with a repeat of 10.  Both runs ran from the same
clean state.

I measured peak memory usage and total catalog compilation time (ie
adding up the "compiled catalog in xxx.x seconds" output) with our
actual Puppet configuration.


Ruby 1.8.4:
peak memory consumption:     2686 MB
total catalog compilation time:  26632 seconds


Ruby EE 20090421:
peak memory consumption:     1462 MB
total catalog compilation time:  13693.5 seconds


wow.


-- 
Nigel Kersten
nig...@google.com
System Administrator
Google, Inc.

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