Use uninitialized instead of _ in lazyval benchmarks

Author: mbovel

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/ContendedInitialization.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -16,12 +17,12 @@ import java.util.concurrent.{Executors, ExecutorService}
 class ContendedInitialization {
 
   @Param(Array("2000000", "5000000"))
-  var size: Int = _
+  var size: Int = uninitialized
 
   @Param(Array("2", "4", "8"))
-  var nThreads: Int = _
+  var nThreads: Int = uninitialized
 
-  var executor: ExecutorService = _
+  var executor: ExecutorService = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccess.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccess {
 
-  var holder: LazyHolder = _
+  var holder: LazyHolder = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccessAny.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyAnyHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccessAny {
 
-  var holder: LazyAnyHolder = _
+  var holder: LazyAnyHolder = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccessGeneric.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyGenericHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccessGeneric {
 
-  var holder: LazyGenericHolder[String] = _
+  var holder: LazyGenericHolder[String] = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccessInt.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations.*
 import org.openjdk.jmh.infra.Blackhole
 import LazyVals.LazyIntHolder
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccessInt {
 
-  var holder: LazyIntHolder = _
+  var holder: LazyIntHolder = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccessMultiple.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccessMultiple {
 
-  var holders: Array[LazyHolder] = _
+  var holders: Array[LazyHolder] = uninitialized
 
   @Setup
   def prepare: Unit = {

bench-micro/src/main/scala/dotty/tools/benchmarks/lazyvals/InitializedAccessString.scala

@@ -1,5 +1,6 @@
 package dotty.tools.benchmarks.lazyvals
 
+import compiletime.uninitialized
 import org.openjdk.jmh.annotations._
 import LazyVals.LazyStringHolder
 import org.openjdk.jmh.infra.Blackhole
@@ -14,7 +15,7 @@ import java.util.concurrent.TimeUnit
 @State(Scope.Benchmark)
 class InitializedAccessString {
 
-  var holder: LazyStringHolder = _
+  var holder: LazyStringHolder = uninitialized
 
   @Setup
   def prepare: Unit = {