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Performance: Loop Values vs Loop Examples
CharlieFirpo
Member Posts: 48 
Contributor II
Dear All!
I have to process an ExampleSet that has 100.000 examples. To do this, I use a Loop operator, and in it I process the examples. At the first iteration, I process the first example, at the second iteration I process the second example and so on. For this I use a Filter Example within the Loop operator. At the Filter Example operator I can use the Loop operator's macro to filter out the correct example.
If I use Loop Values then I use a value-typed macro, so in the Filter Example there is a condition that compares values (the type is text, the values are about 20-50 character long). And if I use Loop Example, then the loop macro is an index-typed macro and in the Filter Example operator the comarison happens between numbers/integers (of course I need an ID to do this).
So I think Loop Example is more effective in performance. Am I rigth? Are there any tests or manuals, tutorials that show if there is any difference in performance between the Loop Values and Loop Examples operators?
Of course I can do some test for me, but some official reference would be appriciated!
Thank you!!!
I have to process an ExampleSet that has 100.000 examples. To do this, I use a Loop operator, and in it I process the examples. At the first iteration, I process the first example, at the second iteration I process the second example and so on. For this I use a Filter Example within the Loop operator. At the Filter Example operator I can use the Loop operator's macro to filter out the correct example.
If I use Loop Values then I use a value-typed macro, so in the Filter Example there is a condition that compares values (the type is text, the values are about 20-50 character long). And if I use Loop Example, then the loop macro is an index-typed macro and in the Filter Example operator the comarison happens between numbers/integers (of course I need an ID to do this).
So I think Loop Example is more effective in performance. Am I rigth? Are there any tests or manuals, tutorials that show if there is any difference in performance between the Loop Values and Loop Examples operators?
Of course I can do some test for me, but some official reference would be appriciated!
Thank you!!!
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Answers
Loop Values, on the other hand, should be used if you want to loop over different values of an attribute, e.g. over the different classes stored in a label attribute.
Best regards,
Marius
Where should I use Filter Example Range? Within the Loop Examples?
Within the Loop I have several operators and all operator needs in all iteration. The Loop's input is an exampleSet that has 100.000 examples (rows) and I have to process them one-by-one. So in one iteration I want process only one example. With Filter Example Range, how can I select which example should be processed within the Loop in an iteration?
If I don't use Filter Example in the Loop then all examples of the exampleSet will be processed in one iteration. And because I have 100.000 examples so I will have 100.000 iterations.
yes, place it into Loop Examples, and for both values enter %{example} (or however you named the iteration_macro of Loop Examples).
Best regards,
Marius