Groovy1.5.2是Groovy1.5.0釋出後的第二bug修正版本(類似於JDK1.5update2)，旨在進一步提高Groovy的品質，除了Groovy1.5.1和Groovy1.5.2這兩個bug修正版本外，還有最後一個bug修正版本Groovy1.5.3。

最近Groovy Team正致力於提升Groovy的效能，他們研發出了call site快取技術，能顯著提升Groovy的整體效能，
部分測試顯示Groovy的效能提升了2~4倍，這與應用場景相關。
這些最佳化我們將在Groovy1.6中便可體驗到 :)

下載：

下面是Groovy1.5.2修正和改進的內容：

Release Notes - groovy - Version 1.5.2 - HTML format

Bug

• [] - java.lang.ClassFormatError running groovy script. from shell (bash)
• [] - println invoked on a writer object still prints to System.out and not to the given writer
• [] - Strange behavior. on property setter
• [] - If one constructor calls another, instance variables may be initialized incorrectly
• [] - getParameters and asSql process / strip nulls incorrectly
• [] - Parsing quoted method name fails if there is no modifier
• [] - Optional interface modifier
• [] - Default method parameters
• [] - Repeating superinterface in implements clause
• [] - Incorrect behaviour of a parse error.
• [] - 'as' not allowed as namespace in embedding Groovy-code
• [] - String minus() fails in case of regex chars in operand [minor breaking change]
• [GROOVY-1684] - MarkupBuilder throws NPE if element content or attribute values are null
• [] - Windows start scripts have problems with -Dfoo=bar parameters
• [] - OrderBy Comparable Check
• [] - Why in script. I can define variable with access modifiers private public protected simultaniously?
• [] - Code completion does not find all Java classes
• [] - Can't insert null values into database
• [] - mysql: class of result columns from "show full processlist" is byte array, should be java.lang.String
• [] - groovyc documentation needs update!!!
• [] - ConcurrentModificationException when accessing iterator variable in nested iterator
• [] - Code completion throws NPE when Groovy nature is not enabled
• [] - Can't reflect groovy script. annotations in java
• [] - Processing XML with XQuery Example not working
• [] - [].sum() should return 0 not null.
• [] - Stackoverflow with groovy & ant
• [] - Cannot resolve which method to invoke with extended interfaces
• [] - Addition to ProjectExplorer needs to much System-Performance
• [] - New TestNG-Test Wizard forget to inherit from superclass
• [] - NPE in codecompletion if underlying type is null
• [] - fail to lauch groovysh with cygwin
• [] - Range of enum not working
• [] - list of string output format changed between 1.5.0 and 1.5.1
• [] - Groovy XML-RPC uses ISO-8859-1 for the XML-RPC response even if it is declared as UTF-8
• [] - groovy hangs if enum range includes last value
• [] - Enum range works only for Groovy enums and not for Java enums
• [] - regex with / and \ causes compilation error on 1.5.1
• [] - 'in' with an array always returns false
• [] - Groovy does not enforce implementation contract on interface that extends interface
• [] - Qualified static property reference from static method of qualified class causes infinate recursion
• [] - VerifyError instead of compilation error
• [] - StreamingMarkupBuilder assumes that the encoding is always known
• [] - More problems with covariant return types
• [] - performance issue with collections operations when numbers are elements of the collections
• [] - A labelled continue statement does not appear to correctly imitate its Java counterpart.
• [] - getAt calls not selecting right implementation
• [] - Static properties are not overriden correctly in the byte code
• [] - java.lang.IllegalAccessError: tried to access method org.codehaus.groovy.reflection.CachedClass.coerceArgument(Ljava/lang/Object;)Ljava/lang/Object; from class org.codehaus.groovy.runtime.dgm$328
• [] - MissingMethodExceptions in highly concurrent environments
• [] - assertEquals() raises IllegalAccessError for Lists
• [] - Swingbuilder table content gets mixed up when columns are re-ordered by dragging.
• [] - Java.lang.VerifyError... signature: (Ljavax/swing/JTable;Ljava/lang/Object;Lboolean;Lboolean;Lint;Lint;)Ljava/awt/Component;)
• [] - ExpandoMetaClass returns expando properties twice
• [] - Command line option -D does not work in Windows XP but does in MacOSX
• [] - GString should be serializable
• [] - Expression with "as int" fails (regression)

Improvement

• [] - Allow junit.framework.TestCase to be run by groovy command
• [] - provide GString versions for Sql.rows and Sql.firstRow() [minor breaking change]
• [] - Patch to provide acess to Script. Object in GroovyScriptEngine
• [] - Error message when trying to execute a directory should be improved
• [] - Improve docs for Collection.groupBy and add new Collection.collate(Closure) [Small breaking change]
• [GROOVY-1681] - null.setProperty yields confusing error message
• [] - Change compiler error message "Closure expression looks like it may be an isolated open block" to make it more clear
• [] - Errors in templates syntax produce not so helpful error messages
• [] - Add 1 argument constructor to groovy.util.Node, and corresponding groovy.util.XmlParser appendNode('someElementName') method
• [] - Provide a reverseEach method for arrays
• [] - Provide an enhanced each() method for subclasses of java.lang.Enum
• [] - Allow JUnit 4 tests to be run by the groovy command
• [] - Code completion import improvements
• [] - Hover link improvements
• [] - Change all withXXX methods to return the value returned by their closure instead of void
• [] - Add a Groovy version of the JavaPluginImages to simplify access to common icons
• [] - Allow Map.eachWithIndex to be called with a three-arg closure
• [] - superfluous checked exception: IOException in Script#evaluate(String)

New Feature

• [] - groovy SQL needs to create updateable rowsets
• [] - Provide size() on StringBuilder
• [] - List#indexOf(groovy.lang.Closure closure) and friends to groovy jdk
• [] - improve the org.w3c.dom.Node support with List and Map methods
• [] - Provide a collectAll() method for lists (WAS: Provide a 'SpreadAllDot' operator)
• [] - Add support for coercing strings to enum classes with "as" keyword
• [] - Add newInputStream and withInputStream to java.net.URL for dealing with binary files
• [] - Add support for JavaDocs
• [] - Adding support for code-templates
• [] - Implement a Quick-Outline