@Alex, I am using 1.6.0. Transducers is something i wanna try out.

@Andy, I wasn't aware of YourKit. I have been using JProfiler and VisualVM. 
I liked it, seems smoother than the other two.

Alex

On Monday, November 17, 2014 8:31:25 PM UTC+2, Alex Miller wrote:
>
> What version of Clojure are you using? 
>
> This seems like a use case where transducers could help significantly in 
> avoiding lazy effects and intermediate objects.
>
> On Monday, November 17, 2014 4:28:12 AM UTC-6, Alexander L. wrote:
>>
>> Hi all,
>>
>> I understand that the following question is a long shot without any 
>> proper proof/tests from my side but it's a little bit difficult to make a 
>> test case from the specific part of my app so I will just ask anyway in 
>> case anyone knows anything.
>>
>> The situation is like this: 
>>
>>    - I have a hashmap with *3386* items that I pass through few 
>>    functions in order to append new keys or update existing ones to each 
>>    hashmap entry.
>>    - Each hashmap item has 20 keys with various data types (mostly 
>>    strings)
>>    - All my transformation functions use `reduce`.
>>
>> The problem:
>>
>> I have a top level function which I inside it I call 7 other functions 
>> (all written by me) and for some reason I haven't discovered is that it 
>> needs around 2 seconds to return a result even though the items aren't many.
>> Now, i used `time` to benchmark each function and when I found which one 
>> is taking a lot of time to return, after I removed it, I discovered that 
>> the problem still existed but now moved on to a different function.
>>
>> I did a bunch of tests with those 3386 on the REPL and reduce but I 
>> didn't notice anything weird/slow so it must be a combination of things. 
>> Also, i doubt that this is a RAM problem, i have allocated 4GB for the JVM. 
>>
>> So, my question is, has anyone every seen a situation like this with a 
>> bunch of `reduce` calls? Is there anything at all that I should check and 
>> maybe missed it? 
>>
>> Regards
>>
>> Alex
>>
>

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