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https://issues.apache.org/jira/browse/TEXT-153?focusedWorklogId=207492&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-207492
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ASF GitHub Bot logged work on TEXT-153:
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Author: ASF GitHub Bot
Created on: 04/Mar/19 23:04
Start Date: 04/Mar/19 23:04
Worklog Time Spent: 10m
Work Description: amirhadadi commented on issue #108: TEXT-153: Make
prefixSet a BitSet.
URL: https://github.com/apache/commons-text/pull/108#issuecomment-469458107
@garydgregory updated changes.xml.
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Issue Time Tracking
-------------------
Worklog Id: (was: 207492)
Time Spent: 1h (was: 50m)
> LookupTranslator performance optimization
> -----------------------------------------
>
> Key: TEXT-153
> URL: https://issues.apache.org/jira/browse/TEXT-153
> Project: Commons Text
> Issue Type: Improvement
> Affects Versions: 1.0
> Reporter: Amir Hadadi
> Priority: Minor
> Time Spent: 1h
> Remaining Estimate: 0h
>
> When using Java Mission Control to profile an application that uses
> StringEscapeUtils::escapeEcmaScript, I noticed that a lot of time is spent in
> LookupTranslator::translate at the prefixSet::contains check.
> I suggest taking advantage of the fact that prefixSet contains only
> characters, and replace it with a BitSet.
> I did some benchmarking and translate for the non escaped case is 4-5X faster
> when replacing the HashSet with a BitSet.
> BitSet Memory consumption for characters is capped at 8KB, and depends on the
> maximal prefix character. For example for ECMA script the max escaped prefix
> character is "\" which has unicode code 92 so the BitSet uses a long array of
> length 2 to represent all the needed characters.
>
> Link to pull request: https://github.com/apache/commons-text/pull/108
>
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