Most efficient way [Ruby sollutions]

[NewOne]

I start this discussion because I noticed that different ways of doing same thing give major differences in time of execution.
If this thread will be sustained, I hope that ideas which will be posted here will help us all to make more efficient codes.
Here is my first observation:
I ran this code on a model with 12800 component instances and the result was this:

with this version: time for completion: 0.047

model = Sketchup.active_model
ents = model.entities
count = 0
t1 = Time.new

ents.each do |ent|
		if ent.class == Sketchup;;ComponentInstance
			count += 1
		end
end

t2 = Time.new
dt = t2 - t1

puts 'entities parsed; ' + count.to_s
puts 'time for completion; ' + dt.to_s

Using this condition: time for completion: 0.078

if ent.typename == 'ComponentInstance'
			count += 1
		end

[thomthom]

Check this thread for performance info:
http://forums.sketchucation.com/viewtopic.php?f=180&t=19576#p162235

I extended the test with more iterations:
http://forums.sketchucation.com/viewtopic.php?f=180&t=19576&st=0&sk=t&sd=a&start=15#p166698

Basically:
Avoid .typename as string comparison is slow.

.is_a? and .kind_of? is aliases of the same method, they are both fast. In theory comparing .class should be quicker as the ruby source perform less calculations, but even with a large number of iterations there isn't much deviation from .is_a? / .kind_of? .