save hashmap code

be/src/vec/exec/join/join_op.h

@@ -26,15 +26,16 @@ namespace doris::vectorized {
 struct RowRef {
     using SizeT = uint32_t; /// Do not use size_t cause of memory economy
 
-    SizeT row_num = 0;
     uint8_t block_offset;
+    uint8_t batch_offset = 0;
     // Use in right join to mark row is visited
     // TODO: opt the varaible to use it only need
     bool visited = false;
+    SizeT row_num = 0;
 
     RowRef() {}
     RowRef(size_t row_num_count, uint8_t block_offset_, bool is_visited = false)
-            : row_num(row_num_count), block_offset(block_offset_), visited(is_visited) {}
+            : block_offset(block_offset_), visited(is_visited), row_num(row_num_count) {}
 };
 
 /// Single linked list of references to rows. Used for ALL JOINs (non-unique JOINs)
@@ -43,13 +44,12 @@ struct RowRefList : RowRef {
     struct Batch {
         static constexpr size_t MAX_SIZE = 7; /// Adequate values are 3, 7, 15, 31.
 
-        SizeT size = 0; /// It's smaller than size_t but keeps align in Arena.
-        Batch* next;
         RowRef row_refs[MAX_SIZE];
+        Batch* next;
 
         Batch(Batch* parent) : next(parent) {}
 
-        bool full() const { return size == MAX_SIZE; }
+        bool full() const { return row_refs[0].batch_offset == MAX_SIZE; }
 
         Batch* insert(RowRef&& row_ref, Arena& pool) {
             if (full()) {
@@ -59,7 +59,7 @@ struct RowRefList : RowRef {
                 return batch;
             }
 
-            row_refs[size++] = std::move(row_ref);
+            row_refs[row_refs[0].batch_offset++] = std::move(row_ref);
             return this;
         }
     };
@@ -94,7 +94,7 @@ struct RowRefList : RowRef {
 
             if (batch) {
                 ++position;
-                if (position >= batch->size) {
+                if (position >= batch->row_refs[0].batch_offset) {
                     batch = batch->next;
                     position = 0;
                 }

build.sh

@@ -117,7 +117,7 @@ fi
 
 eval set -- "${OPTS}"
 
-PARALLEL="$(($(nproc) / 4 + 1))"
+PARALLEL="$(($(nproc) / 3 + 1))"
 BUILD_FE=0
 BUILD_BE=0
 BUILD_BROKER=0