Hey fellow Kotliners I have published a new article to hacke

Question

Hey fellow Kotliners I have published a new article to hackernoon <https hackernoon com how kotlin calamity devours your java apps like cancer f3ce9500a028> sorry for too powerful title in advance If you like what you see please give me some medium claps you can do up to 50 and share it on social media Feedback is welcome as well

bascarsija · Answer

superficial nit gt There is that fuzz around Android actively adopting Kotlin as a primary programming language this might read better as gt There is that buzz around Android actively adopting Kotlin as a primary programming language

Oleksii · Answer

< bascarsija> thank you Already fixed this one

voddan · Answer

gt Kotlin s build times are about two times slower than Java Wowowow That needs evidence and or correction <https medium com keepsafe engineering kotlin vs java compilation speed e6c174b39b5d>

Oleksii · Answer

Doesn t article confirm my point exactly First run kotlin compile about N seconds Second run java compile about N seconds plus minus as well And you need both compile runs if your app is mixed Java Kotlin Hence the 2x speed no Or did I misunderstand something

Oleksii · Answer

And the whole article is about feelings of the target audience not precision and proofs When I work on web projects with mixed java kotlin it feels twice as slow on average Precise numbers are not important when in realm of feelings

Oleksii · Answer

Also maybe the setup on these past projects was not optimal Maybe we can avoid doing two compile runs most of the time or at all If so please tell me so

voddan · Answer

< Oleksii> I feel that we use different terminology What the article calls first run aka cold run is a clean build of the entire project including building Java as well as Kotlin code The second run aka incremental build is building the project without deleting previously compiled class files again both Java and Kotlin included

voddan · Answer

gt And you need both compile runs if your app is mixed Java Kotlin I think Kotlin compilation times already include compiling the Java e i those N seconds are already javac+kotlinc+javac for clean builds For incremental builds the system is smart enough to mitigate the overhead completely

Oleksii · Answer

So what you are trying to tell me is that properly configured kotlin project should compile as fast as Java Could it be that we ve experienced slow compiler start in the past Like in compile time is quick but compiler takes a few seconds to start when running tests in intellij Do you know if that is common misconfiguration In these particular projects we were just adding `apply plugin kotlin ` to our Gradle file together with kotlin spring and kotlin autoopen plugins We added compile dependency for Kotlin stdlib and Kotlin reflect lib Anything rings the bell

Oleksii · Answer

< voddan> I ve fixed it to read Moreover Kotlin s build times are extremely fast It can be even faster than Java if you have incremental compilation enabled

voddan · Answer

< Oleksii> +1 doesn t it sounds more optimistic than before stuck out tongue

Oleksii · Answer

It does I ll still have to figure out how to set it up properly on my next project