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https://issues.apache.org/jira/browse/TIKA-529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12920085#action_12920085
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Radek commented on TIKA-529:
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Actually, if you accept the patch, could you reverse the two first conditions.
This way ascii characters would immediately fail first test (faster). I meant
to code it this way but got lost in all the negative numbers involved.
> IBM420 charset detection's isLamAlef is allocation-happy
> --------------------------------------------------------
>
> Key: TIKA-529
> URL: https://issues.apache.org/jira/browse/TIKA-529
> Project: Tika
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.8
> Reporter: Radek
> Assignee: Ken Krugler
> Priority: Minor
> Attachments: isLamAlef.diff
>
>
> Two IBM420 charset detectors (rtl and ltr) run isLamAlef() for each byte of
> detection buffer.
> The code is allocating and filling a bytes array every time it runs, which
> makes it responsible for approximately 70% of all object allocations in my
> current test case (many text files).
> Since array is identical every time, and the entire thing can be achieved
> without any array, this is wasteful.
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