perf and bugfix

include/utils/bucketers.hpp

@@ -12,14 +12,14 @@ struct table_bucketer {
               const double alpha) {
         base.init(num_buckets, lambda, table_size, alpha);
 
-        fulcrums.push_back(0);
+        fulcrums[0] = 0;
         for (size_t xi = 0; xi < FULCS - 1; xi++) {
             double x = double(xi) / double(FULCS - 1);
             double y = base.bucketRelative(x);
             auto fulcV = uint64_t(y * double(num_buckets << 16));
-            fulcrums.push_back(fulcV);
+            fulcrums[xi + 1] = fulcV;
         }
-        fulcrums.push_back(num_buckets << 16);
+        fulcrums[FULCS - 1] = num_buckets << 16;
     }
 
     inline uint64_t bucket(const uint64_t hash) const {
@@ -58,7 +58,7 @@ struct table_bucketer {
 
     Bucketer base;
     static const uint64_t FULCS = 2048;
-    std::vector<uint64_t> fulcrums;
+    std::array<uint64_t, FULCS> fulcrums;
 };
 
 struct opt_bucketer {

include/utils/dense_encoders.hpp

@@ -29,7 +29,7 @@ struct diff {
     }
 
     size_t num_bits() const {
-        return sizeof(m_increment) + m_encoder.num_bits();
+        return 8 * sizeof(m_increment) + m_encoder.num_bits();
     }
 
     inline uint64_t access(uint64_t i) const {

src/build.cpp

@@ -523,7 +523,7 @@ void build(cmd_line_parser::parser const& parser, Iterator keys, uint64_t num_ke
         return;
     }
 
-    config.secondary_sort = false;  // parser.get<bool>("secondary_sort");
+    config.secondary_sort = true;  // parser.get<bool>("secondary_sort");
     config.minimal = parser.get<bool>("minimal");
     config.verbose = parser.get<bool>("verbose");