hamilton-earthscope commented on PR #573:
URL: https://github.com/apache/arrow-go/pull/573#issuecomment-3530197583

   Improvement from iceberg writes with list columns:
   
   ---
   
   ### **ListPrimitive Schema** (`list<string>`)
   
   | Records | Throughput Before | Throughput After | **Improvement** |
   |---------|------------------|------------------|-----------------|
   | 100K | 366K rec/sec | 451K rec/sec | **+23%** |
   | 500K | 475K rec/sec | 1.09M rec/sec | **+130%** |
   | 2.5M | 224K rec/sec | 1.52M rec/sec | **+577%** |
   
   **Memory Usage (2.5M records)**:
   - Before: **342 GB** allocated
   - After: **14 GB** allocated  
   - **Reduction: -96%**
   
   ---
   
   ### **ListStruct Schema** (`list<struct<...>>`)
   
   | Records | Throughput Before | Throughput After | **Improvement** |
   |---------|------------------|------------------|-----------------|
   | 100K | 247K rec/sec | 359K rec/sec | **+45%** |
   | 500K | 195K rec/sec | 594K rec/sec | **+205%** |
   | 2.5M | 74K rec/sec | 729K rec/sec | **+883%** |
   
   **Memory Usage (2.5M records)**:
   - Before: **1,100 GB** allocated
   - After: **19.7 GB** allocated
   - **Reduction: -98%**
   


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