POI Fast Calc

A Java library to calculate Excel formulas quickly.

This is a fork of Apache POI version 3.16 that serves simply to calculate formulas quickly, it supports XLSX (Excel 2007) row/column limits in the HSSF engine for much faster evaluation than XML-backed XSSF is capable of, with the drawback that it can’t read or write XLS/XLSX files from or to disk. Read the email thread with my original proposed patch to upstream poi for background.

To use, add this to your maven pom.xml:

<dependency>
  <groupId>com.moparisthebest.poi</groupId>
  <artifactId>poi-fast-calc</artifactId>
  <version>3.16-SNAPSHOT</version>
</dependency>

The org.apache.poi package has been renamed com.moparisthebest.poi and all dependencies removed, so this can cleanly live aside modern/newer upstream poi forever, and shouldn’t ever need to change.