# v0.4.3 Release Notes

> v0.4.2 -> v0.4.3

## Summary

Switch AOF compaction trigger from line count to byte size with a 1MB floor, so compaction reflects actual disk waste and replay cost instead of record count.
<details>
<summary>翻譯</summary>
將 AOF 壓縮觸發條件從行數改為位元組大小並設定 1MB 門檻，讓壓縮時機貼近實際磁碟浪費與 replay 成本，而非單純的記錄筆數。
</details>

## Changes

### PERF
- Replace line-count-based compaction trigger with byte-size tracking (`aofSize` / `aofSizeBaseline`)
- Set 1MB minimum size floor before compaction can fire, preventing thrashing on small databases
- Trigger compaction when `aofSize >= max(baseline, 1MB) * 2`, giving compaction cost proper amortization
- Update `replayAOF` to accumulate byte size instead of line count, and reuse scanner bytes to avoid extra allocations

<details>
<summary>翻譯</summary>

- 以位元組追蹤 (`aofSize` / `aofSizeBaseline`) 取代基於行數的壓縮觸發條件
- 設定 1MB 最小門檻，避免小型資料庫頻繁壓縮造成 thrashing
- 觸發條件改為 `aofSize >= max(baseline, 1MB) * 2`，讓壓縮成本得到合理攤銷
- `replayAOF` 改以位元組累計大小，並直接重用 scanner bytes 減少額外配置

</details>

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## Files Changed

| File | Status | Tag |
|------|--------|-----|
| `core/store/aof.go` | Modified | PERF |
| `core/store/store.go` | Modified | PERF |

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