diff --git a/docs/release-notes/.FSharp.Compiler.Service/8.0.200.md b/docs/release-notes/.FSharp.Compiler.Service/8.0.200.md
index 701b6c0d2cc..72037533dfd 100644
--- a/docs/release-notes/.FSharp.Compiler.Service/8.0.200.md
+++ b/docs/release-notes/.FSharp.Compiler.Service/8.0.200.md
@@ -15,3 +15,7 @@
 * Parser recovers on unfinished record declarations. ([PR #16357](https://github.com/dotnet/fsharp/pull/16357))
 * `MutableKeyword` to [SynFieldTrivia](../reference/fsharp-compiler-syntaxtrivia-synfieldtrivia.html) ([PR #16357](https://github.com/dotnet/fsharp/pull/16357))
 * Added support for a new parameterless constructor for `CustomOperationAttribute`, which, when applied, will use method name as keyword for custom operation in computation expression builder. ([PR #16475](https://github.com/dotnet/fsharp/pull/16475), part of implementation for [fslang-suggestions/1250](https://github.com/fsharp/fslang-suggestions/issues/1250))
+
+### Changed
+
+* Speed up unused opens handling for empty results. ([PR #16502](https://github.com/dotnet/fsharp/pull/16502))
diff --git a/src/Compiler/Service/ServiceAnalysis.fs b/src/Compiler/Service/ServiceAnalysis.fs
index 16d9f953681..89569a802c8 100644
--- a/src/Compiler/Service/ServiceAnalysis.fs
+++ b/src/Compiler/Service/ServiceAnalysis.fs
@@ -297,12 +297,19 @@ module UnusedOpens =
     /// Async to allow cancellation.
     let getUnusedOpens (checkFileResults: FSharpCheckFileResults, getSourceLineStr: int -> string) : Async<range list> =
         async {
-            let! ct = Async.CancellationToken
-            let symbolUses = checkFileResults.GetAllUsesOfAllSymbolsInFile(ct)
-            let symbolUses = filterSymbolUses getSourceLineStr symbolUses
-            let symbolUses = splitSymbolUses symbolUses
-            let openStatements = getOpenStatements checkFileResults.OpenDeclarations
-            return! filterOpenStatements symbolUses openStatements
+            if checkFileResults.OpenDeclarations.Length = 0 then
+                return []
+            else
+                let! ct = Async.CancellationToken
+                let symbolUses = checkFileResults.GetAllUsesOfAllSymbolsInFile(ct)
+                let symbolUses = filterSymbolUses getSourceLineStr symbolUses
+                let symbolUses = splitSymbolUses symbolUses
+                let openStatements = getOpenStatements checkFileResults.OpenDeclarations
+
+                if openStatements.Length = 0 then
+                    return []
+                else
+                    return! filterOpenStatements symbolUses openStatements
         }
 
 module SimplifyNames =