[Bug 63482] Application hang because of autoSizeColumn

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=63482

--- Comment #3 from Cody Lerum <co...@gmail.com> ---
I ran into this same issue today when making the move from Java 8 to Java 11
and from POI 3.17 to 4.1.0 and I've narrowed this down to a slowdown with Java
11. It doesn't matter if you are running 3.17 or 4.1.0

When running the simple reproducer (taken from the SSPerformanceTest) below
with POI 4.1.0


Elapsed 2.71 seconds for arguments [HSSF, 5000, 15, 1] on Java 1.8.0_212

Elapsed 35.08 seconds for arguments [HSSF, 5000, 15, 1] on Java 11.0.4

Elapsed 33.27 seconds for arguments [HSSF, 5000, 15, 1] on Java 12.0.1

The situation seems resolved in Java 13

Elapsed 3.44 seconds for arguments [HSSF, 5000, 15, 1] on Java 13


FYI this This is still an issue on the latest nightly pulled from AdoptOpenJDK:

Elapsed 37.13 seconds for arguments [HSSF, 5000, 15, 1] on Java 11.0.5

Commenting out the sheet.autoSizeColumn(i) yields:
Elapsed 0.54 seconds for arguments [HSSF, 5000, 15, 1] on Java 11.0.5



https://gist.github.com/codylerum/5e302c4cd69e133206ddde9e50f44daa

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