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benchmarks with StringBuilder and String.plus similar to string inter… #11

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Merged
alex28sh merged 2 commits into from
Dec 19, 2025
Merged

benchmarks with StringBuilder and String.plus similar to string inter… #11

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benchmarks with StringBuilder and String.plus similar to string inter…
alex28sh Dec 17, 2025
cacd350
fixup! benchmarks with StringBuilder and String.plus similar to strin…
alex28sh Dec 18, 2025
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44 changes: 44 additions & 0 deletions src/commonMain/kotlin/microBenchmarks/StringBenchmark.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -143,4 +143,48 @@ class StringBenchmark {
}
return sum
}

@Benchmark
fun stringBuilderCompareWithInterpolation(): Int {
var sum = 0
var i = 0
var j = 0
while (i < BENCHMARK_SIZE) {
val add1 = stringsInterpolation[j]
j = (j + 1) and 15
val add2 = stringsInterpolation[j]
j = (j + 1) and 15
val add3 = stringsInterpolation[j]
j = (j + 1) and 15
val builder = StringBuilder(add1)
builder.append(add2)
builder.append(add3)
val string = builder.toString()
sum += string.length
i++
}
return sum
}

@Benchmark
fun stringPlusCompareWithInterpolation(): Int {
var sum = 0
var i = 0
var j = 0
while (i < BENCHMARK_SIZE) {
val add1 = stringsInterpolation[j]
j = (j + 1) and 15
val add2 = stringsInterpolation[j]
j = (j + 1) and 15
val add3 = stringsInterpolation[j]
j = (j + 1) and 15
var string = add1
string = string.plus(add2)
string = string.plus(add3)
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@bashor bashor Dec 17, 2025

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I'd change it into add1 + add2 + add3

sum += string.length
i++
}
return sum
}

}