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Title
# announcements
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Hoanghun5

12/10/2019, 12:50 PM
Hello, I got an assignment to benchmark Java vs Kotlin. I was thinking I could benchmark Collections insert and remove speed such as ArrayList.add. Is it a good idea or does Kotlin just use internally Java colletions? If so, what else could I benchmark to show difference between Java and Kotlin?
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LeoColman

12/10/2019, 12:52 PM
does Kotlin just use internally Java colletions
That's pretty much it
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Hoanghun5

12/10/2019, 12:53 PM
Hmm, what could I benchmark then? Streams vs Sequences?
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LeoColman

12/10/2019, 12:53 PM
Kotlin and Java performance will be pretty much the same when executing on the JVM. What you should "benchmark" is lines of code per feature and amount of bugs per line of code
Streams vs Sequences
You can use Java streams in kotlin as well
So that's an unfair benchmark, as you won't show differences between the two languages
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Hoanghun5

12/10/2019, 12:54 PM
Ah, okay. Might be a bad topic for my assignment then 😕
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LeoColman

12/10/2019, 12:55 PM
Why do you need to check for performance?
I mean, what is the use for a benchmark?
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Hoanghun5

12/10/2019, 12:56 PM
It’s my school assignment. I got “Benchmarking” and I chose Java vs Kotlin, thought it could show some interesting stuff but I guess I should have done more research
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LeoColman

12/10/2019, 12:56 PM
Is that benchmark specific to performance?
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Hoanghun5

12/10/2019, 12:57 PM
No, I don’t think so, we are learning about Benchmarking in general
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LeoColman

12/10/2019, 12:58 PM
You c ould benchmark Kotlin vs Kotlin itself
For example, comparing List and Sequence
Applying many operations on a List is worse than applying many operations on a Sequence
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Hoanghun5

12/10/2019, 12:59 PM
I think that is a good idea. Do you have some more examples? Maybe mutable and immutable?
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LeoColman

12/10/2019, 1:00 PM
Maybe
List
operations vs
Sequence
operations (filter + map + fold ... in a row)
Maybe inline vs not-inlined functions (high-order functions mainly)
Coroutines vs Threads
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Hoanghun5

12/10/2019, 1:02 PM
Just learned about inline stuff, that could be great to benchmark, could show some solid stuff.
You are great, thanks a lot
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LeoColman

12/10/2019, 1:04 PM
Try to find out why X performs better than Y, and not only that it does. You'll study the language more if you do that
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Hoanghun5

12/10/2019, 1:05 PM
Yeah, my teacher told me to look at the bytecode generated so I guess I’ll try to look into that
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Rajiv

12/10/2019, 1:20 PM
They teach kotlin in University?
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LeoColman

12/10/2019, 1:21 PM
It's probably not specific to Kotlin
👍 1
Likely some sort of software engineering in which one must learn how to benchmark two algorithms or something like that
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Rajiv

12/10/2019, 1:22 PM
Yeah possible
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Hoanghun5

12/10/2019, 4:11 PM
Yeah, it’s a course “performance and reliability” 🙂
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Rajiv

12/10/2019, 4:12 PM
Awesome :) futuristic curriculum lol, my college still teaches C as a modern language xD
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Hoanghun5

12/10/2019, 4:13 PM
as modern? 😄 sounds odd. I mean C is awesome but not as modern language 😄
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Rajiv

12/10/2019, 4:14 PM
Yeah lol that is the sad situation of cs education in India
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LeoColman

12/10/2019, 4:15 PM
I see C as a modern language tho
It's still very used in the academical field. Not very used in the business world tho
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Rajiv

12/10/2019, 4:16 PM
Hmm it's cool as it gives good foundation
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Hoanghun5

12/10/2019, 4:19 PM
Leonardo, so I talked to my tutor, and he told me I can do the suggested Kotlin vs Kotlin. He recommended I try sequences vs list. And then try something like different order of operations such as map and then filter vs filter and then map, if the order is optimized
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LeoColman

12/10/2019, 4:20 PM
@Hoanghun5 Nice! Do you know the differences between List and Sequence?
I recommend going for big values (100_000 elements or more), or else you won't see any difference
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Hoanghun5

12/10/2019, 4:21 PM
I know that sequence should do the operations lazily and list doesnt
that’s about the difference i know
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LeoColman

12/10/2019, 4:21 PM
I think that's pretty much it
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Hoanghun5

12/10/2019, 4:22 PM
Is there a difference if I use Sequence on ArrayList or LinkedList? That was another idea my tutor had
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LeoColman

12/10/2019, 4:22 PM
There might be a difference depending on the operations you're executing
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Hoanghun5

12/10/2019, 4:23 PM
awesome, so another thing I could do .. I am supposed to show 15 scenarios.
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Guillermo Robles

12/10/2019, 9:01 PM
Another idea is to benchmark Kotlin vs Java compilation time and memory usage. And how incremental builds improve compilation.
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