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https://issues.jboss.org/browse/RF-12652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Darius Ski updated RF-12652:
----------------------------
Description:
In ScriptUtils.toScript(Object obj) method there is allocation of StringBuilder
with default size (of 16 characters). When large sized strings are passed to
this method ( for example in partial rendering user bean returns a String with
custom JSON ), method incurs penalty due to reallocations ( both in GC pressure
and CPU use).
The preallocation size could be set to 1.6-2 of initial size, cause we know
that String is getting escaped and inflated by both normal (*2) and unicode
escapes ( \u00XX style * 6).
was:
In ScriptUtils.toScript(Object obj) method there is allocation of StringBuilder
with default size (of 16bytes). When large sized strings are passed to this
method ( for example in partial rendering user bean returns a String with
custom JSON ), method incurs penalty due to reallocations ( both in GC pressure
and CPU use).
The preallocation size could be set to 1.6-2 of initial size, cause we know
that String is getting escaped and inflated by both normal (*2) and unicode
escapes ( \u00XX style * 6).
> Improve ScriptUtils performance by doing early preallocation in String encode
> path
> ----------------------------------------------------------------------------------
>
> Key: RF-12652
> URL: https://issues.jboss.org/browse/RF-12652
> Project: RichFaces
> Issue Type: Enhancement
> Security Level: Public(Everyone can see)
> Components: core
> Affects Versions: 4.3.0.M2
> Reporter: Darius Ski
> Priority: Minor
>
> In ScriptUtils.toScript(Object obj) method there is allocation of
> StringBuilder with default size (of 16 characters). When large sized strings
> are passed to this method ( for example in partial rendering user bean
> returns a String with custom JSON ), method incurs penalty due to
> reallocations ( both in GC pressure and CPU use).
> The preallocation size could be set to 1.6-2 of initial size, cause we know
> that String is getting escaped and inflated by both normal (*2) and unicode
> escapes ( \u00XX style * 6).
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