// IMPORTANT! // Please, when your changes cause failures in bytecodeText tests for 'for' loops, // examine the resulting bytecode shape carefully. // Range and progression-based loops generated with Kotlin compiler should be // as close as possible to Java counter loops ('for (int i = a; i < b; ++i) { ... }'). // Otherwise it may result in performance regression due to missing HotSpot optimizations. // Run Kotlin compiler benchmarks (https://github.com/Kotlin/kotlin-benchmarks) // with compiler built from your changes if you are not sure. fun test() { var s = "" for (c in "testString") { s += c } for (c in StringBuilder("testStringBuilder")) { s += c } for (c in "testCharSequence".apply{}) { s += c } } // 0 iterator // 0 hasNext // 0 nextChar // JVM_IR_TEMPLATES // 10 ILOAD // 8 ISTORE // 0 IADD // 0 ISUB // 3 IINC