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Too long same methods chain

Reports long Reactive Streams transformation chains.

Each operator method call, such as map() or filter(), creates some objects for those operators. Calling a long chain of operators on each subscription, for each stream element, may cause performance overhead. To avoid it, combine a long chain of calls into one operator call wherever possible.


Flux.just(1, 2, 3) .map(it -> it + 1) .map(it -> it + 2) .map(it -> it + 3)

After the quick-fix is applied:

Flux.just(1, 2, 3) .map(it -> it + 1 + 2 + 3)

New in 2019.3

Inspection options

Here you can find the description of settings available for the Too long same methods chain inspection, and the reference of their default values.

The longest allowed same methods chain length


Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Reactive Streams, 241.16690

Last modified: 29 April 2024