diff --git a/Sources/CSV/Seralizer.swift b/Sources/CSV/Seralizer.swift
index b8903f1..24932db 100644
--- a/Sources/CSV/Seralizer.swift
+++ b/Sources/CSV/Seralizer.swift
@@ -103,11 +103,7 @@ public struct Serializer {
 
         if !self.serializedHeaders {
             let headers = data.keys.map { title -> [UInt8] in
-                if let delimiter = self.configuration.cellDelimiter {
-                    return title.bytes.escaping(delimiter)
-                } else {
-                    return title.bytes
-                }
+                return title.bytes.escaping(self.configuration.cellDelimiter)
             }
             do { try self.onRow(Array(headers.joined(separator: [configuration.cellSeparator]))) }
             catch let error { errors.errors.append(error) }
@@ -117,11 +113,7 @@ public struct Serializer {
         guard let first = data.first?.value else { return errors.result }
         (first.startIndex..<first.endIndex).forEach { index in
             let cells = data.values.map { column -> [UInt8] in
-                if let delimiter = self.configuration.cellDelimiter {
-                    return column[index].bytes.escaping(delimiter)
-                } else {
-                    return column[index].bytes
-                }
+                return column[index].bytes.escaping(self.configuration.cellDelimiter)
             }
             do { try onRow(Array(cells.joined(separator: [configuration.cellSeparator]))) }
             catch let error { errors.errors.append(error) }
diff --git a/Tests/CSVTests/StressTests.swift b/Tests/CSVTests/StressTests.swift
index 8bf39b9..15cbab9 100644
--- a/Tests/CSVTests/StressTests.swift
+++ b/Tests/CSVTests/StressTests.swift
@@ -38,7 +38,7 @@ final class StressTests: XCTestCase {
         let csv = Array(data)
         let parsed = SyncParser().parse(csv)
 
-        // Baseline: 21.951
+        // Baseline: 21.453
         // Time to beat: 11.932
         measure {
             serializer.serialize(parsed)
@@ -50,7 +50,7 @@ final class StressTests: XCTestCase {
         let csv = Array(data)
         let parsed = SyncParser().parse(csv)
 
-        // Baseline: 22.721
+        // Baseline: 22.903
         // Time to beat: 11.932
         measure {
             _ = serializer.serialize(parsed)