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Tests for large BigIntegers multiplication and power are provided.

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Km implementation is very slow.
This commit is contained in:
zhelenskiy 2021-04-16 22:15:12 +03:00
parent 65a8d8f581
commit a110dc20d5
1 changed files with 28 additions and 3 deletions
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31
examples/src/benchmarks/kotlin/space/kscience/kmath/benchmarks/BigIntBenchmark.kt
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@ -5,19 +5,24 @@
package space.kscience.kmath.benchmarks package space.kscience.kmath.benchmarks
import edu.mcgill.kaliningraph.power
import kotlinx.benchmark.Blackhole import kotlinx.benchmark.Blackhole
import org.openjdk.jmh.annotations.Benchmark import org.openjdk.jmh.annotations.Benchmark
import org.openjdk.jmh.annotations.Scope import org.openjdk.jmh.annotations.Scope
import org.openjdk.jmh.annotations.State import org.openjdk.jmh.annotations.State
import space.kscience.kmath.operations.BigIntField import space.kscience.kmath.operations.*
import space.kscience.kmath.operations.JBigIntegerField
import space.kscience.kmath.operations.invoke
@State(Scope.Benchmark) @State(Scope.Benchmark)
internal class BigIntBenchmark { internal class BigIntBenchmark {
val kmNumber = BigIntField.number(Int.MAX_VALUE) val kmNumber = BigIntField.number(Int.MAX_VALUE)
val largeKmNumber = BigIntField {
fun BigInt.pow10(): BigInt = power(10, ::multiply)
number(11).pow10().pow10().pow10()
}
val jvmNumber = JBigIntegerField.number(Int.MAX_VALUE) val jvmNumber = JBigIntegerField.number(Int.MAX_VALUE)
val largeJvmNumber = JBigIntegerField { number(11).pow(1000) }
val bigExponent = 50_000
@Benchmark @Benchmark
fun kmAdd(blackhole: Blackhole) = BigIntField { fun kmAdd(blackhole: Blackhole) = BigIntField {
@ -34,8 +39,28 @@ internal class BigIntBenchmark {
blackhole.consume(kmNumber * kmNumber * kmNumber) blackhole.consume(kmNumber * kmNumber * kmNumber)
} }
@Benchmark
fun kmMultiplyLarge(blackhole: Blackhole) = BigIntField {
blackhole.consume(largeKmNumber.let { it * it })
}
@Benchmark @Benchmark
fun jvmMultiply(blackhole: Blackhole) = JBigIntegerField { fun jvmMultiply(blackhole: Blackhole) = JBigIntegerField {
blackhole.consume(jvmNumber * jvmNumber * jvmNumber) blackhole.consume(jvmNumber * jvmNumber * jvmNumber)
} }
@Benchmark
fun jvmMultiplyLarge(blackhole: Blackhole) = JBigIntegerField {
blackhole.consume(largeJvmNumber.let { it * it })
}
@Benchmark
fun kmPower(blackhole: Blackhole) = BigIntField {
blackhole.consume(kmNumber.power(bigExponent, ::multiply))
}
@Benchmark
fun jvmPower(blackhole: Blackhole) = JBigIntegerField {
blackhole.consume(jvmNumber.pow(bigExponent))
}
} }