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Month: September 2018

Kotlin Collections API Performance Antipatterns

Kotlin’s Collections API is expressive and rich – but with great power comes great responsibility – there are certain practices that can cause an unnecessary time-complexity and object allocation overhead.

To fully understand the context, make sure to check the previous article first:

Kotlin: Beware of Java Stream API Habits

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The Ultimate Guide to the Java Stream API groupingBy() Collector

The groupingBy() is one of the most powerful and customizable Stream API collectors.

If you constantly find yourself not going beyond:


…or simply wanted to discover more its potential uses, then this article is for you.

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