diff --git a/.gitignore b/.gitignore
index 3308331..de8628f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,6 +54,7 @@ ewm
 scr_test
 cpu_test
 chr_test
+mem_bench
 
 *.bin
 *.lst
diff --git a/src/Makefile b/src/Makefile
index 6d386a2..eefd16c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -44,10 +44,15 @@ CPU_BENCH_SOURCES=cpu.c ins.c mem.c fmt.c cpu_bench.c
 CPU_BENCH_OBJECTS=$(CPU_BENCH_SOURCES:.c=.o)
 CPU_BENCH_LIBS=
 
-all: $(EWM_SOURCES) $(EWM_EXECUTABLE) $(CPU_TEST_SOURCES) $(CPU_TEST_EXECUTABLE) $(SCR_TEST_EXECUTABLE) $(CPU_BENCH)
+MEM_BENCH=mem_bench
+MEM_BENCH_SOURCES=cpu.c ins.c mem.c fmt.c mem_bench.c
+MEM_BENCH_OBJECTS=$(MEM_BENCH_SOURCES:.c=.o)
+MEM_BENCH_LIBS=
+
+all: $(EWM_SOURCES) $(EWM_EXECUTABLE) $(CPU_TEST_SOURCES) $(CPU_TEST_EXECUTABLE) $(SCR_TEST_EXECUTABLE) $(CPU_BENCH) $(MEM_BENCH)
 
 clean:
-	rm -f $(EWM_OBJECTS) $(EWM_EXECUTABLE) $(CPU_TEST_OBJECTS) $(CPU_TEST_EXECUTABLE) $(SCR_TEST_OBJECTS) $(SCR_TEST_EXECUTABLE) $(CPU_BENCH)
+	rm -f $(EWM_OBJECTS) $(EWM_EXECUTABLE) $(CPU_TEST_OBJECTS) $(CPU_TEST_EXECUTABLE) $(SCR_TEST_OBJECTS) $(SCR_TEST_EXECUTABLE) $(CPU_BENCH) $(MEM_BENCH)
 
 $(EWM_EXECUTABLE): $(EWM_OBJECTS)
 	$(CC) $(LDFLAGS) $(EWM_OBJECTS) $(EWM_LIBS) -o $@
@@ -61,5 +66,8 @@ $(SCR_TEST_EXECUTABLE): $(SCR_TEST_OBJECTS)
 $(CPU_BENCH): $(CPU_BENCH_OBJECTS)
 	$(CC) $(LDFLAGS) $(CPU_BENCH_OBJECTS) $(CPU_BENCH_LIBS) -o $@
 
+$(MEM_BENCH): $(MEM_BENCH_OBJECTS)
+	$(CC) $(LDFLAGS) $(MEM_BENCH_OBJECTS) $(MEM_BENCH_LIBS) -o $@
+
 .c.o:
 	$(CC) $(CFLAGS) $< -c -o $@
diff --git a/src/mem_bench.c b/src/mem_bench.c
new file mode 100644
index 0000000..b4f0740
--- /dev/null
+++ b/src/mem_bench.c
@@ -0,0 +1,187 @@
+// The MIT License (MIT)
+//
+// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <time.h>
+
+#include "cpu.h"
+#include "mem.h"
+
+#define MEM_BENCH_ITERATIONS (100 * 1000 * 1000)
+
+#define MEM_GET_TEST(NAME, ADDR) \
+   void test_ ## NAME ## _ ## ADDR(struct cpu_t *cpu) { \
+       for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) { \
+          (void) NAME(cpu, ADDR); \
+       } \
+   }
+
+#define MEM_SET_TEST(NAME, ADDR) \
+   void test_ ## NAME ## _ ## ADDR(struct cpu_t *cpu) { \
+       for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) { \
+          (void) NAME(cpu, ADDR, 0xaa); \
+       } \
+   }
+
+#define RUN_TEST(NAME, ADDR) test(cpu, #NAME, test_ ## NAME ## _ ## ADDR)
+
+typedef void (*test_run_t)(struct cpu_t *cpu);
+
+void test_cpu_push_byte(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      _cpu_push_byte(cpu, 0xaa);
+   }
+}
+
+void test_cpu_pull_byte(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      (void) _cpu_pull_byte(cpu);
+   }
+}
+
+void test_cpu_push_word(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      _cpu_push_word(cpu, 0xaeae);
+   }
+}
+
+void test_cpu_pull_word(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      (void) _cpu_pull_word(cpu);
+   }
+}
+
+void test_mem_get_byte(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      (void) mem_get_byte(cpu, 0x1234);
+   }
+}
+
+void test_mem_set_byte(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      mem_set_byte(cpu, 0x1234, 0xaa);
+   }
+}
+
+void test_mem_get_byte_zp(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      (void) mem_get_byte(cpu, 0x0011);
+   }
+}
+
+void test_mem_set_byte_zp(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      mem_set_byte(cpu, 0x0011, 0xaa);
+   }
+}
+
+void test_mem_get_byte_stack(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      (void) mem_get_byte(cpu, 0x0111);
+   }
+}
+
+void test_mem_set_byte_stack(struct cpu_t *cpu) {
+   for (uint64_t i = 0; i < MEM_BENCH_ITERATIONS; i++) {
+      mem_set_byte(cpu, 0x0111, 0xaa);
+   }
+}
+
+MEM_GET_TEST(mem_get_byte, 0x1234)
+MEM_GET_TEST(mem_get_byte_abs, 0x1234)
+MEM_GET_TEST(mem_get_byte_absx, 0x1234)
+MEM_GET_TEST(mem_get_byte_absy, 0x1234)
+MEM_GET_TEST(mem_get_byte_zpg, 0x12)
+MEM_GET_TEST(mem_get_byte_zpgx, 0x12)
+MEM_GET_TEST(mem_get_byte_zpgy, 0x12)
+MEM_GET_TEST(mem_get_byte_ind, 0x12)
+MEM_GET_TEST(mem_get_byte_indx, 0x12)
+MEM_GET_TEST(mem_get_byte_indy, 0x12)
+
+MEM_SET_TEST(mem_set_byte, 0x1234)
+MEM_SET_TEST(mem_set_byte_abs, 0x1234)
+MEM_SET_TEST(mem_set_byte_absx, 0x1234)
+MEM_SET_TEST(mem_set_byte_absy, 0x1234)
+MEM_SET_TEST(mem_set_byte_zpg, 0x12)
+MEM_SET_TEST(mem_set_byte_zpgx, 0x12)
+MEM_SET_TEST(mem_set_byte_zpgy, 0x12)
+MEM_SET_TEST(mem_set_byte_ind, 0x12)
+MEM_SET_TEST(mem_set_byte_indx, 0x12)
+MEM_SET_TEST(mem_set_byte_indy, 0x12)
+
+void test(struct cpu_t *cpu, char *name, test_run_t test_run) {
+   struct timespec start;
+   if (clock_gettime(CLOCK_REALTIME, &start) != 0) {
+      perror("Cannot get time");
+      exit(1);
+   }
+
+   test_run(cpu);
+
+   struct timespec now;
+   if (clock_gettime(CLOCK_REALTIME, &now) != 0) {
+      perror("Cannot get time");
+      exit(1);
+   }
+
+   uint64_t duration_ms = (now.tv_sec * 1000 + (now.tv_nsec / 1000000))
+      - (start.tv_sec * 1000 + (start.tv_nsec / 1000000));
+
+   printf("%-32s %8llu\n", name, duration_ms);
+}
+
+int main(int argc, char **argv) {
+   struct cpu_t *cpu = cpu_create(EWM_CPU_MODEL_6502);
+   cpu_add_ram_data(cpu, 0, 0xffff, malloc(0xffff));
+   cpu_reset(cpu);
+
+   printf("-------------------------------- --------\n");
+   test(cpu, "_cpu_push_byte", test_cpu_push_byte);
+   test(cpu, "_cpu_pull_byte", test_cpu_pull_byte);
+   test(cpu, "_cpu_push_word", test_cpu_push_word);
+   test(cpu, "_cpu_pull_word", test_cpu_pull_word);
+
+   printf("-------------------------------- --------\n");
+   RUN_TEST(mem_get_byte, 0x1234);
+   RUN_TEST(mem_get_byte_abs, 0x1234);
+   RUN_TEST(mem_get_byte_absx, 0x1234);
+   RUN_TEST(mem_get_byte_absy, 0x1234);
+   RUN_TEST(mem_get_byte_zpg, 0x12);
+   RUN_TEST(mem_get_byte_zpgx, 0x12);
+   RUN_TEST(mem_get_byte_zpgy, 0x12);
+   RUN_TEST(mem_get_byte_ind, 0x12);
+   RUN_TEST(mem_get_byte_indx, 0x12);
+   RUN_TEST(mem_get_byte_indy, 0x12);
+
+   printf("-------------------------------- --------\n");
+   RUN_TEST(mem_set_byte, 0x1234);
+   RUN_TEST(mem_set_byte_abs, 0x1234);
+   RUN_TEST(mem_set_byte_absx, 0x1234);
+   RUN_TEST(mem_set_byte_absy, 0x1234);
+   RUN_TEST(mem_set_byte_zpg, 0x12);
+   RUN_TEST(mem_set_byte_zpgx, 0x12);
+   RUN_TEST(mem_set_byte_zpgy, 0x12);
+   RUN_TEST(mem_set_byte_ind, 0x12);
+   RUN_TEST(mem_set_byte_indx, 0x12);
+   RUN_TEST(mem_set_byte_indy, 0x12);
+}