[richfaces-issues] [JBoss JIRA] (RF-12652) Improve ScriptUtils performance by doing early preallocation in String encode path

[Darius Ski (JIRA)]

Darius Ski created RF-12652:
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             Summary: 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 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).

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