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lppedd/TypedArrayBenchmark.kt

Last active March 11, 2026 23:34
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Revisions

  1. lppedd revised this gist Mar 11, 2026. 1 changed file with 5 additions and 1 deletion.
    6 changes: 5 additions & 1 deletion TypedArrayBenchmark.kt
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    Original file line number Diff line number Diff line change
    @@ -1,6 +1,10 @@
    import kotlinx.benchmark.*

    {
    @State(Scope.Benchmark)
    @BenchmarkMode(Mode.Throughput)
    @Warmup(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    @Measurement(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    public class ByteArrayBenchmark {
    private val fromArray: ByteArray

    @Param("15", "100", "1000", "5000", "15000", "100000", "1000000")
  2. lppedd revised this gist Mar 11, 2026. 1 changed file with 1 addition and 5 deletions.
    6 changes: 1 addition & 5 deletions TypedArrayBenchmark.kt
    View file
    Original file line number Diff line number Diff line change
    @@ -1,10 +1,6 @@
    import kotlinx.benchmark.*

    @State(Scope.Benchmark)
    @BenchmarkMode(Mode.Throughput)
    @Warmup(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    @Measurement(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    public class ByteArrayToStringBenchmark {
    {
    private val fromArray: ByteArray

    @Param("15", "100", "1000", "5000", "15000", "100000", "1000000")
  3. lppedd created this gist Mar 11, 2026.
    56 changes: 56 additions & 0 deletions TypedArrayBenchmark.kt
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,56 @@
    import kotlinx.benchmark.*

    @State(Scope.Benchmark)
    @BenchmarkMode(Mode.Throughput)
    @Warmup(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    @Measurement(iterations = 4, time = 5, timeUnit = BenchmarkTimeUnit.SECONDS)
    public class ByteArrayToStringBenchmark {
    private val fromArray: ByteArray

    @Param("15", "100", "1000", "5000", "15000", "100000", "1000000")
    public var newSize: Int = 0

    public constructor() {
    val size = 10000
    val range = 0..255
    val array = ByteArray(size)

    for (i in 0..<size) {
    array[i] = range.random().toByte()
    }

    fromArray = array
    }

    @Benchmark
    public fun typedArraySet(blackhole: Blackhole) {
    val size = fromArray.size
    val toArray = when {
    newSize < 16 || size < 16 -> ktFillFrom(fromArray, ByteArray(newSize))
    newSize > size -> ByteArray(newSize).also { copy ->
    copy.asDynamic().set(fromArray, 0)
    }
    else -> fromArray.asDynamic().slice(0, newSize)
    }

    blackhole.consume(toArray.unsafeCast<Any>())
    }

    @Benchmark
    public fun fillFrom(blackhole: Blackhole) {
    val toArray = ktFillFrom(fromArray, ByteArray(newSize))
    blackhole.consume(toArray)
    }

    private fun ktFillFrom(src: dynamic, dst: dynamic): ByteArray {
    val srcLen: Int = src.length
    val dstLen: Int = dst.length
    var index: Int = 0
    val arr = dst.unsafeCast<Array<Any?>>()
    while (index < srcLen && index < dstLen) {
    arr[index] = src[index]
    index++
    }
    return dst
    }
    }