# Full 820 Combination Sweep - Preview

## What's Being Tested

### Complete Strategy Matrix

**Node Strategies (40 total, excluding AUTO):**
1. TREE_GRAPH_HYBRID - Tree + graph hybrid
2. HASH_MAP - O(1) hash lookups
3. ORDERED_MAP - Sorted key traversal
4. ORDERED_MAP_BALANCED - RB/AVL balanced trees
5. ARRAY_LIST - Dynamic array
6. LINKED_LIST - Insertion-optimized
7. STACK - LIFO operations
8. QUEUE - FIFO operations  
9. PRIORITY_QUEUE - Priority-based
10. DEQUE - Double-ended queue
11. TRIE - Prefix tree
12. RADIX_TRIE - Compressed prefixes
13. PATRICIA - Compressed binary trie
14. HEAP - Priority operations
15. SET_HASH - Set operations
16. SET_TREE - Ordered sets
17. BLOOM_FILTER - Membership tests
18. CUCKOO_HASH - High load factors
19. BITMAP - Static bitmap
20. BITSET_DYNAMIC - Resizable bitset
21. ROARING_BITMAP - Sparse bitmaps
22. SPARSE_MATRIX - Sparse matrix ops
23. ADJACENCY_LIST - Graph adjacency
24. B_TREE - Disk/page indexes
25. B_PLUS_TREE - Database B+ tree
26. LSM_TREE - Write-heavy KV store
27. **PERSISTENT_TREE - Immutable functional** ⭐ (Current champion!)
28. COW_TREE - Copy-on-write
29. UNION_FIND - Connectivity
30. SEGMENT_TREE - Range queries
31. FENWICK_TREE - Prefix sums
32. SUFFIX_ARRAY - Substring search
33. AHO_CORASICK - Multi-pattern matching
34. COUNT_MIN_SKETCH - Frequency estimation
35. HYPERLOGLOG - Cardinality estimation
36. SKIP_LIST - Probabilistic
37. RED_BLACK_TREE - Self-balancing BST
38. AVL_TREE - Strictly balanced BST
39. TREAP - Randomized balanced
40. SPLAY_TREE - Self-adjusting BST

**Edge Strategies (18 total + None, excluding AUTO):**
1. **None** - No edge storage
2. TREE_GRAPH_BASIC - Basic graph edges
3. ADJ_LIST - Sparse graphs
4. DYNAMIC_ADJ_LIST - High churn
5. ADJ_MATRIX - Dense graphs
6. BLOCK_ADJ_MATRIX - Cache-friendly
7. CSR - Compressed Sparse Row
8. CSC - Compressed Sparse Column
9. COO - Coordinate format
10. BIDIR_WRAPPER - Undirected edges
11. TEMPORAL_EDGESET - Time-aware
12. HYPEREDGE_SET - Hypergraphs
13. EDGE_PROPERTY_STORE - Columnar storage
14. R_TREE - Spatial indexing
15. QUADTREE - 2D partitioning
16. OCTREE - 3D partitioning
17. FLOW_NETWORK - Flow graphs
18. NEURAL_GRAPH - Neural networks
19. WEIGHTED_GRAPH - Weighted edges

**Total Combinations:** 40 × 19 = **760 combinations**

(Note: Actual count may vary based on valid combinations)

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## Expected Timeline

With ~400 entities per test and ~760 combinations:

- **Per test:** ~0.5-2 seconds
- **Total tests:** 760
- **Estimated time:** 380-1520 seconds = **6-25 minutes**
- **Progress reports:** Every 50 combinations

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## What We'll Learn

### 1. **Best Node Strategy Overall**
Which node mode performs best on average across ALL edge modes?

### 2. **Best Edge Strategy Overall**  
Which edge mode performs best on average across ALL node modes?

### 3. **Optimal Pairing**
Which specific node+edge combo is THE fastest?

### 4. **Edge Overhead Quantified**
Exact performance cost of each edge mode

### 5. **Node Mode Rankings**
Complete ranking from fastest to slowest

### 6. **Surprising Discoveries**
Configurations that defy expectations (like PERSISTENT_TREE!)

### 7. **Invalid Combinations**
Which combinations don't work (incompatible strategies)

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## Current Knowledge (From 30-combo test):

**Top 5 So Far:**
1. PERSISTENT_TREE + None (1.68ms) ⭐
2. COW_TREE + None (1.69ms)
3. B_PLUS_TREE + None (1.69ms)
4. LSM_TREE + DYNAMIC_ADJ_LIST (1.70ms)
5. LSM_TREE + ADJ_LIST (1.71ms)

**Bottom 5 So Far:**
26. HASH_MAP + CSR (2.05ms)
27. TREAP + None (2.05ms)
28. HASH_MAP + EDGE_PROPERTY_STORE (2.06ms)
29. HASH_MAP + WEIGHTED_GRAPH (2.06ms)
30. HASH_MAP + ADJ_LIST (2.09ms)
**Predicted winner:** HASH_MAP + None (2.27ms - DEAD LAST!)

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## Questions to Answer

1. **Is PERSISTENT_TREE the true champion?**
   - Will it beat ALL 730 other combinations?
   - Or is there a hidden gem we haven't tested?

2. **Is HASH_MAP always slow?**
   - Does it lose with EVERY edge mode?
   - Or is there an edge mode that saves it?

3. **Does edge storage matter?**
   - 30-combo test showed 0% overhead
   - Will this hold across all 760 tests?

4. **Best tree variants?**
   - AVL vs RB vs Treap vs Splay?
   - Which balanced tree wins?

5. **Exotic strategies viable?**
   - BLOOM_FILTER, CUCKOO_HASH, ROARING_BITMAP?
   - HYPERLOGLOG, COUNT_MIN_SKETCH?
   - Or just theoretical curiosities?

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## Philosophy

> **"Never trust your intuition - trust the test and data"**

I predicted HASH_MAP + None would win.  
It came in **DEAD LAST** (30th/30).

**This is why we test ALL 820 configurations!** 🎯

Let the data speak. The truth is in the measurements, not our assumptions.

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*Test running... Results pending...*  
*Estimated completion: 15-20 minutes*  
*Stay tuned for the ULTIMATE truth!* 🚀

