diff --git a/M6502/HarteTest_6502/checker_t.cpp b/M6502/HarteTest_6502/checker_t.cpp
index 4acbf62..6323dee 100644
--- a/M6502/HarteTest_6502/checker_t.cpp
+++ b/M6502/HarteTest_6502/checker_t.cpp
@@ -1,20 +1,20 @@
 #include "stdafx.h"
 #include "checker_t.h"
 
-void checker_t::addActualCycle(const uint16_t address, const uint8_t value, const std::string action) {
+void checker_t::addActualCycle(const uint16_t address, const uint8_t value, const std::string_view action) {
     m_actualCycles.push_back({ address, value, action });
 }
 
-void checker_t::addActualCycle(const EightBit::register16_t address, const uint8_t value, const std::string action) {
+void checker_t::addActualCycle(const EightBit::register16_t address, const uint8_t value, const std::string_view action) {
     addActualCycle(address.word, value, action);
 }
 
 void checker_t::addActualReadCycle(const EightBit::register16_t address, const uint8_t value) {
-    addActualCycle(address, value, "read");
+    addActualCycle(address, value, m_read_action);
 }
 
 void checker_t::addActualWriteCycle(const EightBit::register16_t address, const uint8_t value) {
-    addActualCycle(address, value, "write");
+    addActualCycle(address, value, m_write_action);
 }
 
 void checker_t::dumpCycles(const std::string which, const actual_cycles_t& events) {
diff --git a/M6502/HarteTest_6502/checker_t.h b/M6502/HarteTest_6502/checker_t.h
index f46b5dd..8f8d61f 100644
--- a/M6502/HarteTest_6502/checker_t.h
+++ b/M6502/HarteTest_6502/checker_t.h
@@ -20,7 +20,10 @@ private:
     std::ostringstream m_os;
     std::vector<std::string> m_messages;
 
-    typedef std::tuple<uint16_t, uint8_t, std::string> actual_cycle_t;
+    const std::string m_read_action = { "read" };
+    const std::string m_write_action = { "write" };
+
+    typedef std::tuple<uint16_t, uint8_t, std::string_view> actual_cycle_t;
     typedef std::vector<actual_cycle_t> actual_cycles_t;
     actual_cycles_t m_actualCycles;
     bool m_cycle_count_mismatch = false;
@@ -50,8 +53,8 @@ private:
 
     bool check(std::string_view what, uint16_t address, uint8_t expected, uint8_t actual);
 
-    void addActualCycle(uint16_t address, uint8_t value, std::string action);
-    void addActualCycle(EightBit::register16_t address, uint8_t value, std::string action);
+    void addActualCycle(uint16_t address, uint8_t value, std::string_view action);
+    void addActualCycle(EightBit::register16_t address, uint8_t value, std::string_view action);
 
     void addActualReadCycle(EightBit::register16_t address, uint8_t value);
     void addActualWriteCycle(EightBit::register16_t address, uint8_t value);