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Posted to issues@commons.apache.org by "Michael Osipov (Jira)" <ji...@apache.org> on 2023/06/30 15:13:00 UTC

[jira] [Commented] (IMAGING-356) TIFF reading extremely slow in version 1.0-SNAPSHOT

    [ https://issues.apache.org/jira/browse/IMAGING-356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17739127#comment-17739127 ] 

Michael Osipov commented on IMAGING-356:
----------------------------------------

You should bisect to the offending change.

> TIFF reading extremely slow in version 1.0-SNAPSHOT
> ---------------------------------------------------
>
>                 Key: IMAGING-356
>                 URL: https://issues.apache.org/jira/browse/IMAGING-356
>             Project: Commons Imaging
>          Issue Type: Bug
>          Components: Format: TIFF
>    Affects Versions: 1.0
>            Reporter: Gary Lucas
>            Priority: Major
>
> 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.  



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