andygrove opened a new pull request, #1434:
URL: https://github.com/apache/datafusion-ballista/pull/1434

   ## Summary
   
   - Adds criterion benchmarks for the sort-based shuffle writer
   - Input: 8192-row batches with 100 columns of mixed primitive types 
(i8/i16/i32/i64, u8/u16/u32/u64, f32/f64, bool, string)
   - Output: 200 partitions via hash partitioning
   
   ### Benchmark groups
   
   **No spill** (256MB memory limit):
   - `10_batches_200_partitions` — 81,920 rows
   - `50_batches_200_partitions` — 409,600 rows
   
   **With spill**:
   - `50_batches_200_partitions_8mb_limit` — moderate spilling
   - `50_batches_200_partitions_2mb_limit` — heavy spilling
   
   ### Usage
   
   ```bash
   cargo bench --bench sort_shuffle -p ballista-benchmarks
   ```
   
   🤖 Generated with [Claude Code](https://claude.com/claude-code)


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