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https://issues.apache.org/jira/browse/GROOVY-9637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17156411#comment-17156411
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Daniel Sun commented on GROOVY-9637:
------------------------------------
If we return a copy of the array of strings/values, users can not change them
as follows:
{code:java}
public Object[] getValues() {
return values.clone();
}
{code}
{code:groovy}
def x = 42G
def y = "Answer is $x"
y.strings[0] = '6 x 7 = '
y.values[0] = 'the question'
{code}
As to {{toString}} behavior changed by MOP, it is hard to make the constructed
string literal constant unless STC is enabled.
> Improve the performance of GString
> ----------------------------------
>
> Key: GROOVY-9637
> URL: https://issues.apache.org/jira/browse/GROOVY-9637
> Project: Groovy
> Issue Type: Improvement
> Reporter: Daniel Sun
> Priority: Major
> Time Spent: 1h
> Remaining Estimate: 0h
>
> {{GString}} will run {{toString()}} whenever its literal string is needed,
> e.g. methods like {{equals}}, {{hashCode}} are called, but unfortunately its
> literal string will be re-constructed for each time and the process costs
> quite a little of time.
> So I propose to check whether {{GString}} values are all of immutable type,
> e.g. primitive types and their boxed type, {{String}}, etc. If yes, use the
> cached string literal, otherwise re-construct the literal string.
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