more reasonable defaults

Author: Gillgamesh

include/bucket_buffer.h

@@ -115,7 +115,7 @@ class BucketBuffer {
     }
 
     public:
-    BucketBuffer(): _capacity(128) {
+    BucketBuffer(): _capacity(64) {
         entries = std::vector<BufferEntry>();
         entries.reserve(_capacity);
     }

include/sketch.h

@@ -82,9 +82,9 @@ class Sketch {
    * @return              The length of the vector to sketch
    */
   static vec_t calc_vector_length(node_id_t num_vertices) {
-    return ceil(double(num_vertices) * (num_vertices - 1) / 2);
+    // return ceil(double(num_vertices) * (num_vertices - 1) / 2);
     // return num_vertices * 2;
-    // return 50; // round to something thats approx 2^6
+    return 50; // round to something thats approx 2^6
     // return 3;
     // return 15;
     // return 1 + num_vertices / 16 ;