diff --git a/kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/internal/AsmBuilder.kt b/kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/internal/AsmBuilder.kt
index 1edbed28d..93d8d1143 100644
--- a/kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/internal/AsmBuilder.kt
+++ b/kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/internal/AsmBuilder.kt
@@ -191,7 +191,7 @@ internal class AsmBuilder<T>(
         }
 
         val cls = classLoader.defineClass(className, classWriter.toByteArray())
-        java.io.File("dump.class").writeBytes(classWriter.toByteArray())
+        // java.io.File("dump.class").writeBytes(classWriter.toByteArray())
         val l = MethodHandles.publicLookup()
 
         if (hasConstants)
diff --git a/kmath-gsl/src/nativeTest/kotlin/ErrorHandler.kt b/kmath-gsl/src/nativeTest/kotlin/ErrorHandler.kt
index 1259f58b9..0d8fbfbea 100644
--- a/kmath-gsl/src/nativeTest/kotlin/ErrorHandler.kt
+++ b/kmath-gsl/src/nativeTest/kotlin/ErrorHandler.kt
@@ -1,6 +1,5 @@
 package kscience.kmath.gsl
 
-import kotlinx.cinterop.memScoped
 import org.gnu.gsl.gsl_block_calloc
 import kotlin.test.Test
 import kotlin.test.assertFailsWith
@@ -17,7 +16,7 @@ internal class ErrorHandler {
     @Test
     fun matrixAllocation() {
         assertFailsWith<GslException> {
-            memScoped { GslRealMatrixContext(this).produce(Int.MAX_VALUE, Int.MAX_VALUE) { _, _ -> 0.0 } }
+            GslRealMatrixContext { produce(Int.MAX_VALUE, Int.MAX_VALUE) { _, _ -> 0.0 } }
         }
     }
 }
diff --git a/kmath-gsl/src/nativeTest/kotlin/RealTest.kt b/kmath-gsl/src/nativeTest/kotlin/RealTest.kt
index e0a7eadb7..01d9ef90d 100644
--- a/kmath-gsl/src/nativeTest/kotlin/RealTest.kt
+++ b/kmath-gsl/src/nativeTest/kotlin/RealTest.kt
@@ -1,46 +1,71 @@
 package kscience.kmath.gsl
 
-import kotlinx.cinterop.memScoped
 import kscience.kmath.linear.RealMatrixContext
 import kscience.kmath.operations.invoke
 import kscience.kmath.structures.*
 import kotlin.test.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
+import kotlin.time.measureTime
 
 internal class RealTest {
     @Test
-    fun testScale() = memScoped {
-        (GslRealMatrixContext(this)) {
-            val ma = produce(10, 10) { _, _ -> 0.1 }
-            val mb = (ma * 20.0)
-            assertEquals(mb[0, 1], 2.0)
-        }
+    fun testScale() = GslRealMatrixContext {
+        val ma = produce(10, 10) { _, _ -> 0.1 }
+        val mb = (ma * 20.0)
+        assertEquals(mb[0, 1], 2.0)
     }
 
     @Test
-    fun testDotOfMatrixAndVector() = memScoped {
-        (GslRealMatrixContext(this)) {
-            val ma = produce(2, 2) { _, _ -> 100.0 }
-            val vb = RealBuffer(2) { 0.1 }
-            val res1 = ma dot vb
-            val res2 = RealMatrixContext { ma dot vb }
-            println(res1.asSequence().toList())
-            println(res2.asSequence().toList())
-            assertTrue(res1.contentEquals(res2))
-        }
+    fun testDotOfMatrixAndVector() = GslRealMatrixContext {
+        val ma = produce(2, 2) { _, _ -> 100.0 }
+        val vb = RealBuffer(2) { 0.1 }
+        val res1 = ma dot vb
+        val res2 = RealMatrixContext { ma dot vb }
+        println(res1.asSequence().toList())
+        println(res2.asSequence().toList())
+        assertTrue(res1.contentEquals(res2))
     }
 
     @Test
-    fun testDotOfMatrixAndMatrix() = memScoped {
-        (GslRealMatrixContext(this)) {
-            val ma = produce(2, 2) { _, _ -> 100.0 }
-            val mb = produce(2, 2) { _, _ -> 100.0 }
-            val res1: Matrix<Double> = ma dot mb
-            val res2: Matrix<Double> = RealMatrixContext { ma dot mb }
-            println(res1.rows.asIterable().map { it.asSequence() }.flatMap(Sequence<*>::toList))
-            println(res2.rows.asIterable().map { it.asSequence() }.flatMap(Sequence<*>::toList))
-            assertEquals(res1, res2)
+    fun testDotOfMatrixAndMatrix() = GslRealMatrixContext {
+        val ma = produce(2, 2) { _, _ -> 100.0 }
+        val mb = produce(2, 2) { _, _ -> 100.0 }
+        val res1: Matrix<Double> = ma dot mb
+        val res2: Matrix<Double> = RealMatrixContext { ma dot mb }
+        println(res1.rows.asIterable().map { it.asSequence() }.flatMap(Sequence<*>::toList))
+        println(res2.rows.asIterable().map { it.asSequence() }.flatMap(Sequence<*>::toList))
+        assertEquals(res1, res2)
+    }
+
+    @Test
+    fun testManyCalls() {
+        val r1 = GslRealMatrixContext {
+            var prod = produce(20, 20) { _, _ -> 100.0 }
+            val mult = produce(20, 20) { _, _ -> 3.0 }
+
+            measureTime {
+                repeat(100) {
+                    prod = prod dot mult
+                }
+            }.also(::println)
+
+            prod
         }
+
+        val r2 = RealMatrixContext {
+            var prod = produce(20, 20) { _, _ -> 100.0 }
+            val mult = produce(20, 20) { _, _ -> 3.0 }
+
+            measureTime {
+                repeat(100) {
+                    prod = prod dot mult
+                }
+            }.also(::println)
+
+            prod
+        }
+
+        assertTrue(NDStructure.equals(r1, r2))
     }
 }