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Posted to issues@commons.apache.org by "Henri Yandell (JIRA)" <ji...@apache.org> on 2009/07/03 23:12:47 UTC
[jira] Created: (LANG-512) Compare performance of replace method to
regex in Java
Compare performance of replace method to regex in Java
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Key: LANG-512
URL: https://issues.apache.org/jira/browse/LANG-512
Project: Commons Lang
Issue Type: Sub-task
Reporter: Henri Yandell
Fix For: 3.0
Can we delete our replace methods?
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[jira] Commented: (LANG-512) Compare performance of replace method
to regex in Java
Posted by "Henri Yandell (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LANG-512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730226#action_12730226 ]
Henri Yandell commented on LANG-512:
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Completely missed that there's a literal based replace from JDK 1.5 onwards. Here are the stats when including java.lang.String.replace(CharSequence, CharSequence). Namely it sucks, at least on OS X.
Length: 19 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.018
REGX PERF: 0:00:00.066
JDK PERF: 0:00:00.027
Length: 190 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.028
REGX PERF: 0:00:00.099
JDK PERF: 0:00:00.097
Length: 1900 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.244
REGX PERF: 0:00:00.778
JDK PERF: 0:00:00.796
Length: 19000 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:02.452
REGX PERF: 0:00:07.733
JDK PERF: 0:00:07.687
Length: 17000 replacing length 17 with length 16, 5000 times.
LANG PERF: 0:00:02.121
REGX PERF: 0:00:11.659
JDK PERF: 0:00:11.741
> Compare performance of replace method to regex in Java
> ------------------------------------------------------
>
> Key: LANG-512
> URL: https://issues.apache.org/jira/browse/LANG-512
> Project: Commons Lang
> Issue Type: Sub-task
> Reporter: Henri Yandell
> Fix For: 3.0
>
>
> Can we delete our replace methods?
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[jira] Closed: (LANG-512) Compare performance of replace method to
regex in Java
Posted by "Henri Yandell (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LANG-512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Henri Yandell closed LANG-512.
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Resolution: Won't Fix
Closing as we're not going to remove our replacement code.
> Compare performance of replace method to regex in Java
> ------------------------------------------------------
>
> Key: LANG-512
> URL: https://issues.apache.org/jira/browse/LANG-512
> Project: Commons Lang
> Issue Type: Sub-task
> Reporter: Henri Yandell
> Fix For: 3.0
>
>
> Can we delete our replace methods?
--
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You can reply to this email to add a comment to the issue online.
[jira] Commented: (LANG-512) Compare performance of replace method
to regex in Java
Posted by "Henri Yandell (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/LANG-512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729956#action_12729956 ]
Henri Yandell commented on LANG-512:
------------------------------------
Some basic tests. Lang's much quicker than using the JDK's Regex code for static text.
Length: 19 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.017
JDK PERF: 0:00:00.063
Length: 190 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.056
JDK PERF: 0:00:00.143
Length: 1900 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:00.260
JDK PERF: 0:00:01.125
Length: 19000 replacing length 7 with length 6, 5000 times.
LANG PERF: 0:00:02.364
JDK PERF: 0:00:07.258
Length: 17000 replacing length 17 with length 16, 5000 times.
LANG PERF: 0:00:02.028
JDK PERF: 0:00:11.250
> Compare performance of replace method to regex in Java
> ------------------------------------------------------
>
> Key: LANG-512
> URL: https://issues.apache.org/jira/browse/LANG-512
> Project: Commons Lang
> Issue Type: Sub-task
> Reporter: Henri Yandell
> Fix For: 3.0
>
>
> Can we delete our replace methods?
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