diff --git a/java/debugger/impl/src/com/intellij/debugger/memory/utils/StackFrameItem.java b/java/debugger/impl/src/com/intellij/debugger/memory/utils/StackFrameItem.java
index c23eb3499415..7ab32c520236 100644
--- a/java/debugger/impl/src/com/intellij/debugger/memory/utils/StackFrameItem.java
+++ b/java/debugger/impl/src/com/intellij/debugger/memory/utils/StackFrameItem.java
@@ -90,8 +90,9 @@ public class StackFrameItem {
   public static List<StackFrameItem> createFrames(@NotNull SuspendContextImpl suspendContext, boolean withVars) throws EvaluateException {
     ThreadReferenceProxyImpl threadReferenceProxy = suspendContext.getThread();
     if (threadReferenceProxy != null) {
-      List<StackFrameItem> res = new ArrayList<>();
-      for (StackFrameProxyImpl frame : threadReferenceProxy.forceFrames()) {
+      List<StackFrameProxyImpl> frameProxies = threadReferenceProxy.forceFrames();
+      List<StackFrameItem> res = new ArrayList<>(frameProxies.size());
+      for (StackFrameProxyImpl frame : frameProxies) {
         try {
           List<XNamedValue> vars = null;
           Location location = frame.location();