diff --git a/benchmark/single-source/CString.swift b/benchmark/single-source/CString.swift
index 0f242e88edaef..b64a915c631b8 100644
--- a/benchmark/single-source/CString.swift
+++ b/benchmark/single-source/CString.swift
@@ -65,7 +65,7 @@ let reference = 517492
 
 @inline(never)
 public func run_CStringShortAscii(_ N: Int) {
-  
+
   func DoOneIter(_ arr: [String]) -> Int {
     var r = 0
     for n in arr {
@@ -79,11 +79,10 @@ public func run_CStringShortAscii(_ N: Int) {
 
   var res = Int.max
   for _ in 1...100*N {
-    let strings = input.map { 
+    let strings = input.map {
       $0.withCString(String.init(cString:))
     }
     res = res & DoOneIter(strings)
   }
-  assert(res == reference)
+  CheckResults(res == reference)
 }
-
diff --git a/benchmark/single-source/ObjectAllocation.swift b/benchmark/single-source/ObjectAllocation.swift
index f4ee428d46c11..5333a589afbe2 100644
--- a/benchmark/single-source/ObjectAllocation.swift
+++ b/benchmark/single-source/ObjectAllocation.swift
@@ -128,4 +128,3 @@ public func run_ObjectAllocation(_ N: Int) {
   CheckResults(ListResult == 48375)
   CheckResults(ArrayResult == 3000)
 }
-
diff --git a/benchmark/single-source/SortLettersInPlace.swift b/benchmark/single-source/SortLettersInPlace.swift
index b48e521fc8850..2649f02262f66 100644
--- a/benchmark/single-source/SortLettersInPlace.swift
+++ b/benchmark/single-source/SortLettersInPlace.swift
@@ -42,4 +42,3 @@ public func run_SortLettersInPlace(_ N: Int) {
     CheckResults(letters[0].value <= letters[letters.count/2].value)
   }
 }
-
diff --git a/benchmark/utils/TestsUtils.swift b/benchmark/utils/TestsUtils.swift
index 061ead8a0c968..db581344a4b26 100644
--- a/benchmark/utils/TestsUtils.swift
+++ b/benchmark/utils/TestsUtils.swift
@@ -49,11 +49,31 @@ public func Random() -> Int64 {
   return lfsrRandomGenerator.randInt()
 }
 
-public func CheckResults(_ resultsMatch: Bool, _ message: @autoclosure () -> String) {
-  guard resultsMatch else {
-    print(message())
-    abort()
-  }
+@inline(__always)
+public func CheckResults(
+    _ resultsMatch: Bool,
+    file: StaticString = #file,
+    function: StaticString = #function,
+    line: Int = #line
+    ) {
+    guard _fastPath(resultsMatch) else {
+        print("Incorrect result in \(function), \(file):\(line)")
+        abort()
+    }
+}
+
+// Due to potential overhead of passing closures around on the
+// performance measurements, this version is now deprecated
+@available(*, deprecated,
+  message: "For debugging test failures only! Use the version without message.")
+public func CheckResults(
+    _ resultsMatch: Bool,
+    _ message: @autoclosure () -> String
+    ) {
+    guard resultsMatch else {
+        print(message())
+        abort()
+    }
 }
 
 public func False() -> Bool { return false }
@@ -71,9 +91,3 @@ public func someProtocolFactory() -> SomeProtocol { return MyStruct() }
 // which are using it.
 public func blackHole<T>(_ x: T) {
 }
-
-@inline(__always)
-public func CheckResults(_ resultsMatch: Bool) {
-  guard _fastPath(resultsMatch) else { abort() }
-}
-