diff --git a/fftma_module/gen/include/chunk_array.h b/fftma_module/gen/include/chunk_array.h
index 630ccb4..4436d3d 100644
--- a/fftma_module/gen/include/chunk_array.h
+++ b/fftma_module/gen/include/chunk_array.h
@@ -10,6 +10,7 @@
 typedef struct buffer {
     double* data;
     size_t init_pos;
+    bool dirty;
 }buffer_t;
 
 typedef struct chunk_array {
diff --git a/fftma_module/gen/lib_src/chunk_array.c b/fftma_module/gen/lib_src/chunk_array.c
index 13158d4..139a3f5 100644
--- a/fftma_module/gen/lib_src/chunk_array.c
+++ b/fftma_module/gen/lib_src/chunk_array.c
@@ -34,9 +34,11 @@ void chunk_array_flush(chunk_array_t* chunk_array) {
 }
 
 void buffer_flush(chunk_array_t* chunk_array, buffer_t* buffer) {
-    int mod = get_mod(chunk_array, buffer->init_pos);
-    fseek(chunk_array->fp, buffer->init_pos * sizeof(double), SEEK_SET);
-    fwrite(buffer->data, sizeof(double), mod, chunk_array->fp);
+    if (buffer->dirty) {
+        int mod = get_mod(chunk_array, buffer->init_pos);
+        fseek(chunk_array->fp, buffer->init_pos * sizeof(double), SEEK_SET);
+        fwrite(buffer->data, sizeof(double), mod, chunk_array->fp);
+    }
 }
 
 
@@ -63,6 +65,7 @@ buffer_t* buffer_create() {
     }
 
     buffer->init_pos = 0;
+    buffer->dirty = false;
 
     return buffer;
 }
@@ -157,5 +160,6 @@ bool chunk_array_save(chunk_array_t* chunk_array, size_t pos, double valor) {
     }
     int real_pos = pos%get_mod(chunk_array, buffer->init_pos);
 	buffer->data[real_pos]=valor;
+    buffer->dirty = true;
 	return true;
 }
\ No newline at end of file
diff --git a/tests/performance/generation/time.py b/tests/performance/generation/time.py
index 19eb542..0b8b991 100644
--- a/tests/performance/generation/time.py
+++ b/tests/performance/generation/time.py
@@ -47,7 +47,6 @@ def time_measurement(n, sample_size):
         _, duration = generate(n)
         print(i)
         sample.append(duration)
-    
     npsample = np.array(sample)
 
     print(f"AVG: {np.mean(npsample)} seconds")