Benchmark Range

bench.seq.kt

package com.example.benchmark

import androidx.benchmark.junit4.BenchmarkRule
import androidx.benchmark.junit4.measureRepeated
import androidx.test.ext.junit.runners.AndroidJUnit4
import androidx.test.filters.LargeTest
import io.reactivex.rxjava3.core.Flowable
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith

@LargeTest
@RunWith(AndroidJUnit4::class)
class Iterate {

    @get:Rule
    val benchmarkRule = BenchmarkRule()

    @Test
    fun kotlin_range_seq_last() {
        benchmarkRule.measureRepeated {
            (1..1_000_000)
                .asSequence()
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .last()
        }
    }

    @Test
    fun kotlin_range_default_last() {
        benchmarkRule.measureRepeated {
            (1..1_000_000)
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .last()
        }
    }

    @Test
    fun kotlin_range_rxjava_last() {
        benchmarkRule.measureRepeated {
            Flowable.range(0, 1_000_000)
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .blockingLast()
        }
    }

    @Test
    fun kotlin_range_seq_first() {
        benchmarkRule.measureRepeated {
            (1..1_000_000)
                .asSequence()
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .first()
        }
    }

    @Test
    fun kotlin_range_default_first() {
        benchmarkRule.measureRepeated {
            (1..1_000_000)
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .first()
        }
    }

    @Test
    fun kotlin_range_rxjava_first() {
        benchmarkRule.measureRepeated {
            Flowable.range(0, 1_000_000)
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .map { it + 1 }
                .blockingFirst()
        }
    }
}