Java 8: How Lambda expression impacts

Question

I was using java 8 new feature 'Lambda expression' its cool feature to use. I think it helps only developer to simplify the coding. Does it have any performance impact on my application.

private void sortCities(List<String> cities){   //Conventional way
  Collections.sort(cities, new Comparator<String>() {
     @Override
     public int compare(String s1, String s2) {
        return s1.compareTo(s2);
     }
  });

}

private void sortCities(List<String> cities){  //Using Lambda Expression
  Collections.sort(cities, (s1, s2) -> s1.compareTo(s2));

}

Here is a detailed thread on lambdas https://www.reddit.com/r/java/comments/2suvir/java_8_lambda_performance_is_not_great/ — Arunav Sanyal, Jan 25 '16 at 03:05
Faster still is using nothing; since String is comparable, this is equivalent: `Collections.sort(cities)` — Bohemian, Jan 26 '16 at 06:17
"Using a feature because it's cool" is what the road to Developer Hell is paved with. — biziclop, Jan 26 '16 at 11:05

score 1 · Answer 1 · answered Jan 26 '16 at 05:55

1

No, it does not. In your particular case (without capturing arguments) lambda will be actually more performant as the comparator will be created only once and reused, while with anonymous class it will be created each time you call the sortCities method.

answered Jan 26 '16 at 05:55

Tagir Valeev

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Java 8: How Lambda expression impacts

1 Answers1