---
title: "From Heavy to Speedy: Boosting OLAP Performance with Spark Variant Shredding - Castle Cheng"
tags: PyConTW2025, 2025-organize, 2025-共筆
---

# From Heavy to Speedy: Boosting OLAP Performance with Spark Variant Shredding - Castle Cheng

{%hackmd L_RLmFdeSD--CldirtUhCw %}

<iframe src=https://app.sli.do/event/3vQ5KA32Nf2EtjpyxVMrp8 height=450 width=100%></iframe>

:::success
本演講提供 AI 翻譯字幕及摘要，請點選這裡前往 >> [PyCon Taiwan AI Notebook](https://pycontw.connyaku.app/?room=ykoAVrrHPIuSFHlGsD2e)
AI translation subtitles and summaries are available for this talk. Click here to access >> [PyCon Taiwan AI Notebook](https://pycontw.connyaku.app/?room=ykoAVrrHPIuSFHlGsD2e)
:::

> Collaborative writing start from below
> 從這裡開始共筆
- 實務上, 資料存在資料庫裡是很混亂、不結構化的。

Spark 4.0新的DataType: Variant
- fast, open, flexible

Below is the part that speaker updated the talk/tutorial after speech
講者於演講後有更新或勘誤投影片的部份