---
title: Faster file analysis on the import screen
date: 2026-09-07
description: Analyzing an uploaded file is faster, and changing a sheet's data type shows the new result right away instead of re-reading the file.
tags: ["Imports"]
categories: ["Changelog"]
url: https://www.getaltera.com/changelog/2026-09-07-faster-file-analysis-on-import-screen/
---
Setting up an import starts with the app analyzing your file: it detects the data type of each sheet and checks the columns. That step is now quicker, and changing a sheet's type no longer means waiting for the file to be read again.

### Improvements

- **Quicker first analysis** - the analysis reads only the rows it needs instead of the whole file, which matters most for large spreadsheets.
- **Instant type changes** - after the first analysis, choosing a different data type for a sheet shows its columns and warnings right away.
- **Sheet cards stay on screen** - while a new analysis runs, the current result stays visible instead of the page going back to "Analyzing spreadsheet".
- **Analyze reads the file again** - the **Analyze** button always runs a full analysis from the file, for example after you add a metafield definition.