diff --git a/cs677/pa2/sequential.cc b/cs677/pa2/sequential.cc
index 364c405..2aacac4 100644
--- a/cs677/pa2/sequential.cc
+++ b/cs677/pa2/sequential.cc
@@ -10,6 +10,7 @@
 #include <iostream>
 #include <fstream>
 #include <vector>
+#include <sys/time.h>   /* gettimeofday(), struct timeval */
 using namespace std;
 
 #define eq(x, y) ( ( (x) == (y) ) || ( (x) == '?' ) || ( (y) == '?' ) )
@@ -35,7 +36,14 @@ int main(int argc, char * argv[])
     readFile(argv[1], file1);
     readFile(argv[2], file2);
 
+    struct timeval before, after;
+    gettimeofday(&before, NULL);        /* Start timing */
     similarityMatrix(file1, file2);
+    gettimeofday(&after, NULL);         /* Stop timing */
+    double time_before = before.tv_sec + before.tv_usec / 1000000.0;
+    double time_after = after.tv_sec + after.tv_usec / 1000000.0;
+    double diff = time_after - time_before;
+    cout << "Elapsed time: " << diff << " seconds." << endl;
 }
 
 /* Read a file into a vector of non-space characters */
diff --git a/cs677/pa2/threaded.cc b/cs677/pa2/threaded.cc
index 04f9401..04aaee6 100644
--- a/cs677/pa2/threaded.cc
+++ b/cs677/pa2/threaded.cc
@@ -11,6 +11,7 @@
 #include <fstream>
 #include <vector>
 #include <pthread.h>
+#include <sys/time.h>   /* gettimeofday(), struct timeval */
 using namespace std;
 
 #define eq(x, y) ( ( (x) == (y) ) || ( (x) == '?' ) || ( (y) == '?' ) )
@@ -102,6 +103,9 @@ int main(int argc, char * argv[])
     matrix = new int[(files[0].size() + 1) * (files[1].size() + 1)];
     pthread_barrier_init(&barrier, NULL, num_threads);
 
+    struct timeval before, after;
+    gettimeofday(&before, NULL);        /* Start timing */
+
     /* Create num_threads worker threads */
     for (int i = 0; i < num_threads; i++)
     {
@@ -142,6 +146,12 @@ int main(int argc, char * argv[])
     cout << "Maximum value is " << max_val << " at position ("
         << max_i << ", " << max_j << ")" << endl;
 
+    gettimeofday(&after, NULL);         /* Stop timing */
+    double time_before = before.tv_sec + before.tv_usec / 1000000.0;
+    double time_after = after.tv_sec + after.tv_usec / 1000000.0;
+    double diff = time_after - time_before;
+    cout << "Elapsed time: " << diff << " seconds." << endl;
+
     /* Clean up after ourselves */
     pthread_barrier_destroy(&barrier);
     delete[] matrix;