[jira] [Updated] (LUCENE-5884) Speed up FST.ramBytesUsed

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-5884:
---------------------------------------

    Attachment: LUCENE-5884.patch

Simple patch: I just made Outputs.ramBytesUsed abstract and fixed its subclasses to statically compute the "base" bytes used, and then just add in what's different about each output.

I'd also like to pre-compute the bytes used by the arc cache and save that away, instead of computing it each time ... next iteration.

> Speed up FST.ramBytesUsed
> -------------------------
>
>                 Key: LUCENE-5884
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5884
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 5.0, 4.10
>
>         Attachments: LUCENE-5884.patch
>
>
> It's a little heavy now, relying too much on reflection (RUE.shallowSizeOf)... and we do this up to 128 times per FST (= per indexed field, per segment, for the terms index).



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