[IMAGING-356] TIFF reading extremely slow in version 1.0-SNAPSHOT

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.0.0-alpha5
• Component/s: Format: TIFF
• Assignee: Unassigned
• Reporter: Gary Lucas
• Created: 30/Jun/23 15:11
• Updated: 02/Apr/24 18:51

Description

I am using the latest code from github (1.0-SNAPSHOT downloaded from github of June 2023) to read a 300 megabyte TIFF file.  Version 1.0-alpha3 required 673 milliseconds to read that file.  The new code requires upward of 15 minutes.   Clearly something got broken since the last release.

The TIFF file is a 10000x10000 pixel 4 byte image format organized in strips.  The bottleneck appears to occur in the TiffReader getTiffRawImageData method which reads raw data from the file in preparation of creating a BufferedImage object.

I suspect that there may be a general slowness of file access.  In debugging, even reading the initial metadata (22 TIFF tags) took a couple of seconds.