diff --git a/src/drivers/common/mem_alloc.c b/src/drivers/common/mem_alloc.c
index 7932d76a9..43dfe5788 100644
--- a/src/drivers/common/mem_alloc.c
+++ b/src/drivers/common/mem_alloc.c
@@ -280,7 +280,7 @@ void NCI_Free_fn(void       *ptr,
 #ifdef PNC_MALLOC_TRACE
     ncmpii_del_mem_entry(ptr);
 #endif
-    free_counter++;
+    // free_counter++;
     free(ptr);
 }
 
diff --git a/src/drivers/include/common.h b/src/drivers/include/common.h
index f141cca78..7ab9311b0 100644
--- a/src/drivers/include/common.h
+++ b/src/drivers/include/common.h
@@ -53,7 +53,7 @@
      (xtype == NC_UBYTE && itype == MPI_UNSIGNED_CHAR)) ? 0 : 1
 #endif
 
-extern int free_counter;
+// extern int free_counter;
 
 extern void *
 NCI_Malloc_fn(size_t size, const int lineno, const char *func,
diff --git a/src/drivers/ncmpio/ncmpio_close.c b/src/drivers/ncmpio/ncmpio_close.c
index b562650f4..87fb55032 100644
--- a/src/drivers/ncmpio/ncmpio_close.c
+++ b/src/drivers/ncmpio/ncmpio_close.c
@@ -32,7 +32,7 @@
 #include "ncmpio_subfile.h"
 #endif
 
-int free_counter = 0;
+// int free_counter = 0;
 
 /*----< ncmpio_free_NC() >----------------------------------------------------*/
 void
@@ -47,18 +47,18 @@ ncmpio_free_NC(NC *ncp)
     ncmpio_free_NC_dimarray(&ncp->dims);
     // if (rank == 0)
     //     printf("ncmpio_free_NC free() count after ncmpio_free_NC_dimarray: %d\n", free_counter);
-    double dim_free_time = MPI_Wtime() - start_time;
+    // double dim_free_time = MPI_Wtime() - start_time;
     ncmpio_free_NC_attrarray(&ncp->attrs);
     // if (rank == 0)
     //     printf("ncmpio_free_NC free() count after ncmpio_free_NC_attarray: %d\n", free_counter);
-    start_time = MPI_Wtime();
+    // start_time = MPI_Wtime();
     ncmpio_free_NC_vararray(&ncp->vars);
     
     // if (rank == 0)
     //     printf("ncmpio_free_NC free() count after ncmpio_free_NC_vararray: %d\n", free_counter);
-    double var_free_time = MPI_Wtime() - start_time;
-    if (rank == 0)
-        printf("dim_free_time: %f, var_free_time: %f\n", dim_free_time, var_free_time);
+    // double var_free_time = MPI_Wtime() - start_time;
+    // if (rank == 0)
+        // printf("dim_free_time: %f, var_free_time: %f\n", dim_free_time, var_free_time);
     /* The only case that ncp->mpiinfo is MPI_INFO_NULL is when exiting endef
      * from a redef. All other cases reaching here are from ncmpi_close, in
      * which case ncp->mpiinfo is never MPI_INFO_NULL.
@@ -231,16 +231,16 @@ ncmpio_close(void *ncdp)
     }
 
     /* free up space occupied by the header metadata */
-    double free_time_start = MPI_Wtime();
-    free_counter = 0;
+    // double free_time_start = MPI_Wtime();
+    // free_counter = 0;
     ncmpio_free_NC(ncp);
-    double free_time = MPI_Wtime() - free_time_start;
-    int rank;
-    MPI_Comm_rank(ncp->comm, &rank);
-    if (rank == 0){
-        printf("ncmpio_free_NC time: %f\n", free_time);
-        printf("ncmpio_free_NC free() count: %d\n", free_counter);
-    }
+    // double free_time = MPI_Wtime() - free_time_start;
+    // int rank;
+    // MPI_Comm_rank(ncp->comm, &rank);
+    // // if (rank == 0){
+    //     printf("ncmpio_free_NC time: %f\n", free_time);
+    //     printf("ncmpio_free_NC free() count: %d\n", free_counter);
+    // }
 
     return status;
 }
diff --git a/src/drivers/ncmpio/ncmpio_dim.c b/src/drivers/ncmpio/ncmpio_dim.c
index eb4e965b6..dc9b1510b 100644
--- a/src/drivers/ncmpio/ncmpio_dim.c
+++ b/src/drivers/ncmpio/ncmpio_dim.c
@@ -120,15 +120,15 @@ ncmpio_free_NC_dimarray(NC_dimarray *ncap)
     int i;
 
     assert(ncap != NULL);
-    double start_time;
-    double free_dim_array_time;
-    double free_dim_extra_time;
-    double free_dim_hash_time;
+    // double start_time;
+    // double free_dim_array_time;
+    // double free_dim_extra_time;
+    // double free_dim_hash_time;
     if (ncap->value != NULL) {
         /* when error is detected reading NC_DIMENSION tag, ncap->ndefined can
          * be > 0 and ncap->value is still NULL
          */
-        start_time = MPI_Wtime();
+        // start_time = MPI_Wtime();
         for (i=0; i<ncap->ndefined; i++) {
             /* when error is detected reading dimension i, ncap->value[i] can
              * still be NULL
@@ -139,19 +139,19 @@ ncmpio_free_NC_dimarray(NC_dimarray *ncap)
         }
         
         NCI_Free(ncap->value);
-        free_dim_array_time = MPI_Wtime() - start_time;
-        start_time = MPI_Wtime();
+        // free_dim_array_time = MPI_Wtime() - start_time;
+        // start_time = MPI_Wtime();
         NCI_Free(ncap->localids);
         NCI_Free(ncap->indexes);
         ncap->value = NULL;
         ncap->localids = NULL;
         ncap->indexes = NULL;
-        free_dim_extra_time = MPI_Wtime() - start_time;
+        // free_dim_extra_time = MPI_Wtime() - start_time;
         
     }
     ncap->ndefined = 0;
     ncap->nread = 0;
-    start_time = MPI_Wtime();
+    // start_time = MPI_Wtime();
     // printf("dimarray ncap->hash_size: %d\n", ncap->hash_size);
 #ifndef SEARCH_NAME_LINEARLY
     /* free space allocated for dim name lookup table */
@@ -162,8 +162,8 @@ ncmpio_free_NC_dimarray(NC_dimarray *ncap)
         ncap->hash_size = 0;
     }
 #endif
-    free_dim_hash_time = MPI_Wtime() - start_time;
-    printf("free_dim_array_time: %f, free_dim_extra_time: %f, free_dim_hash_time: %f\n", free_dim_array_time, free_dim_extra_time, free_dim_hash_time);
+    // free_dim_hash_time = MPI_Wtime() - start_time;
+    // printf("free_dim_array_time: %f, free_dim_extra_time: %f, free_dim_hash_time: %f\n", free_dim_array_time, free_dim_extra_time, free_dim_hash_time);
 }
 
 /*----< ncmpio_dup_NC_dimarray() >-------------------------------------------*/
diff --git a/src/drivers/ncmpio/ncmpio_var.c b/src/drivers/ncmpio/ncmpio_var.c
index 78ddca109..362161c24 100644
--- a/src/drivers/ncmpio/ncmpio_var.c
+++ b/src/drivers/ncmpio/ncmpio_var.c
@@ -40,7 +40,7 @@ void
 ncmpio_free_NC_var(NC_var *varp)
 {
     if (varp == NULL) return;
-    int old_free_counter = free_counter;
+    // int old_free_counter = free_counter;
 
     ncmpio_free_NC_attrarray(&varp->attrs);
     // if (first_var)
@@ -141,10 +141,10 @@ ncmpio_free_NC_vararray(NC_vararray *ncap)
 
     assert(ncap != NULL);
     // printf("var ncap->ndefined: %d\n", ncap->ndefined);
-    int old_free_counter = free_counter;
+    // int old_free_counter = free_counter;
     // first_var = 1;
-    double start_time, free_var_array_time, free_var_extra_time, free_var_hash_time;
-    start_time = MPI_Wtime();
+    // double start_time, free_var_array_time, free_var_extra_time, free_var_hash_time;
+    // start_time = MPI_Wtime();
     if (ncap->value != NULL) {
         /* when error is detected reading NC_VARIABLE tag, ncap->ndefined can
          * be > 0 and ncap->value is still NULL
@@ -159,20 +159,20 @@ ncmpio_free_NC_vararray(NC_vararray *ncap)
         }
 
         NCI_Free(ncap->value);
-        free_var_array_time = MPI_Wtime() - start_time;
-        start_time = MPI_Wtime();
+        // free_var_array_time = MPI_Wtime() - start_time;
+        // start_time = MPI_Wtime();
         NCI_Free(ncap->localids);
         NCI_Free(ncap->indexes);
         ncap->localids = NULL;
         ncap->indexes = NULL;
         ncap->value    = NULL;
-        free_var_extra_time = MPI_Wtime() - start_time;
+        // free_var_extra_time = MPI_Wtime() - start_time;
         // printf("free_var_array_time: %f, free_var_extra_time: %f\n", free_var_array_time, free_var_extra_time);
     }
     ncap->ndefined = 0;
     ncap->nread = 0;
     // printf("free_counter after free var array: %d\n", free_counter);
-    start_time = MPI_Wtime();
+    // start_time = MPI_Wtime();
     // printf("vararray ncap->hash_size: %d\n", ncap->hash_size);
 #ifndef SEARCH_NAME_LINEARLY
     /* free space allocated for var name lookup table */
@@ -183,8 +183,8 @@ ncmpio_free_NC_vararray(NC_vararray *ncap)
         ncap->hash_size = 0;
     }
 #endif
-    free_var_hash_time = MPI_Wtime() - start_time;
-    printf("free_var_array_time: %f, free_var_extra_time: %f, free_var_hash_time: %f\n", free_var_array_time, free_var_extra_time, free_var_hash_time);
+    // free_var_hash_time = MPI_Wtime() - start_time;
+    // printf("free_var_array_time: %f, free_var_extra_time: %f, free_var_hash_time: %f\n", free_var_array_time, free_var_extra_time, free_var_hash_time);
 }
 
 /*----< ncmpio_dup_NC_vararray() >-------------------------------------------*/