Review fixes

Author: Elena Lepilkina

examples/kotlin-multiplatform/build.gradle

@@ -94,7 +94,7 @@ benchmark {
         fast { // --> jvmFastBenchmark
             include("Common")
             exclude("long")
-            iterations = 10
+            iterations = 5
             iterationTime = 300 // time in ms per iteration
             iterationTimeUnit = "ms" // time in ms per iteration
             advanced("forks", 1)

plugin/main/src/kotlinx/benchmark/gradle/NativeMultiplatformTasks.kt

@@ -116,7 +116,7 @@ fun Project.createNativeBenchmarkExecTask(
         onlyIf { linkTask.enabled }
 
         val reportsDir = benchmarkReportsDir(config, target)
-        reportFile = reportsDir.resolve("${target.name}.json")
+        reportFile = reportsDir.resolve("${target.name}.${config.reportFileExt()}")
 
         val executableFile = linkTask.outputFile.get()
         executable = executableFile.absolutePath
@@ -175,7 +175,6 @@ open class NativeBenchmarkExec() : DefaultTask() {
         // Get full list of running benchmarks
         execute(listOf(configFile.absolutePath, "--list", benchsDescriptionDir.absolutePath))
         val detailedConfigFiles = project.fileTree(benchsDescriptionDir).files.sortedBy { it.absolutePath }
-        val jsonReportParts = mutableListOf<File>()
         val runResults = mutableMapOf<String, String>()
 
         detailedConfigFiles.forEach { runConfig ->

runtime/nativeMain/src/kotlinx/benchmark/native/NativeExecutor.kt

@@ -209,7 +209,8 @@ class NativeExecutor(name: String, args: Array<out String>) : SuiteExecutor(name
     ): Double {
         val executeFunction = benchmark.function
         var counter = cycles
-        GC.collect()
+        if (nativeGCCollectMode == NativeGCCollectMode.Iteration)
+            GC.collect()
         val startTime = getTimeNanos()
         while (counter-- > 0) {
             @Suppress("UNUSED_VARIABLE")
@@ -234,7 +235,8 @@ class NativeExecutor(name: String, args: Array<out String>) : SuiteExecutor(name
         repeat(warmupIterations) { iteration ->
             val benchmarkNanos = config.iterationTime * config.iterationTimeUnit.toMultiplier()
             val executeFunction = benchmark.function
-            GC.collect()
+            if (config.nativeGCCollectMode == NativeGCCollectMode.Iteration)
+                GC.collect()
             val startTime = getTimeNanos()
             var endTime = startTime
             iterations = 0