February 2011 - core-libs-dev

Re: Deprecating puzzling APIs
by David Holmes 10 Feb '11

10 Feb '11

Not a topic for the discuss list (which I've bcc'ed), so moved to core-libs David Holmes Behrang Saeedzadeh said the following on 02/10/11 16:49: > In particular, I am referring to Integer.getInteger, > Boolean.getBoolean, etc. series of methods. These methods are API > smells, confusing to new users, and can lead to all sorts of bugs. > Shouldn't we start deprecating these methods? > > Cheers, > Behrang Saeedzadeh > http://www.behrang.org

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hg: jdk7/tl/langtools: 7018447: langtools launcher template fails if tools run from their own directory
by jonathan.gibbons＠oracle.com 10 Feb '11

10 Feb '11

Changeset: bfa59f3e84bd Author: jjg Date: 2011-02-09 18:26 -0800 URL: http://hg.openjdk.java.net/jdk7/tl/langtools/rev/bfa59f3e84bd 7018447: langtools launcher template fails if tools run from their own directory Reviewed-by: jjg Contributed-by: daniel.smith(a)oracle.com ! src/share/bin/launcher.sh-template

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hg: jdk7/tl/langtools: 7010792: remove bad debugging method from javac
by jonathan.gibbons＠oracle.com 09 Feb '11

09 Feb '11

Changeset: 3ce4e1a07e92 Author: jjg Date: 2011-02-09 14:10 -0800 URL: http://hg.openjdk.java.net/jdk7/tl/langtools/rev/3ce4e1a07e92 7010792: remove bad debugging method from javac Reviewed-by: mcimadamore ! src/share/classes/com/sun/tools/javac/parser/Scanner.java

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hg: jdk7/tl/langtools: 7016750: tools/javac/nio/CompileTest failing in nightly test
by jonathan.gibbons＠oracle.com 09 Feb '11

09 Feb '11

Changeset: c6cb387190ee Author: jjg Date: 2011-02-09 14:04 -0800 URL: http://hg.openjdk.java.net/jdk7/tl/langtools/rev/c6cb387190ee 7016750: tools/javac/nio/CompileTest failing in nightly test Reviewed-by: mcimadamore ! test/tools/javac/nio/compileTest/CompileTest.java

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hg: jdk7/tl/jdk: 2 new changesets
by alan.bateman＠oracle.com 09 Feb '11

09 Feb '11

Changeset: 6a274c4d3e00 Author: alanb Date: 2011-02-09 15:59 +0000 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/6a274c4d3e00 7018258: Dual-pivot updates in 7013585 can fail with ArrayIndexOutOfBoundsException Reviewed-by: alanb Contributed-by: vladimir.yaroslavskiy(a)oracle.com ! src/share/classes/java/util/DualPivotQuicksort.java ! test/java/util/Arrays/Sorting.java Changeset: 37563c09305d Author: alanb Date: 2011-02-09 16:30 +0000 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/37563c09305d Merge

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Dual-Pivot Quicksort improvements for highly structured (nearly sorted) arrays and data with small periods
by Vladimir Iaroslavski 09 Feb '11

09 Feb '11

Hello, Here is improvement for sorting primitives: http://cr.openjdk.java.net/~alanb/7013585/webrev Highly structured (nearly sorted) data like 1,2,3,..,k,1,2,3,..,k,... or 1,2,3,...,n/2,n/2,...,3,2,1 etc. is sorted very effectively by merge sort. The main idea of this optimization is to check if given array is nearly sorted and apply modified and improved merge sort on it. Otherwise, Dual-Pivot Quicksort is applied. Note that the check doesn't decrease the performance of sorting. Other optimization is related to random or repeated data with small period, m <= 10. This type of data is sorted faster by Quicksort with one pivot but with DNF (Dutch National Flag) partition. Therefore, sorting is switched to DNF even calculated pivots are different. The boost of performance with new optimizations is: random data: new: 135, old: 154, ratio: 87.6% ascending: new: 3, old: 45, ratio: 6.6% descending: new: 5, old: 48, ratio: 10.4% organ pipes: new: 20, old: 80, ratio: 25% period(m), m <= 10: new: 10, old: 15, ratio: 66.6% random(m), m <= 10: new: 11, old: 16, ratio: 68.7% equal: new: 2.5, old: 3, new: 83.3% On test suite suggested by Jon Bentley we see the following performance: client VM: old 56%, new 43% server VM: old 46%, new 29% Thank you, Vladimir

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hg: jdk7/tl/jdk: 7013961: Threads attached via JNI attach prevent daemon ThreadGroups from being destroyed
by chris.hegarty＠oracle.com 09 Feb '11

09 Feb '11

Changeset: cd9a302f2806 Author: chegar Date: 2011-02-09 09:53 +0000 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/cd9a302f2806 7013961: Threads attached via JNI attach prevent daemon ThreadGroups from being destroyed Reviewed-by: dholmes ! src/share/classes/java/lang/Thread.java ! src/share/classes/java/lang/ThreadGroup.java

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hg: jdk7/tl/jdk: 7017840: (zipfs) test/demo/zipfs/basic.sh needs to be updated due to 7013420
by xueming.shen＠oracle.com 08 Feb '11

08 Feb '11

Changeset: 6661a1dfa369 Author: sherman Date: 2011-02-08 13:30 -0800 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/6661a1dfa369 7017840: (zipfs) test/demo/zipfs/basic.sh needs to be updated due to 7013420 Summary: updated try-with-resourcse usage in test/demo code Reviewed-by: alanb ! src/share/demo/nio/zipfs/Demo.java ! test/demo/zipfs/ZipFSTester.java ! test/demo/zipfs/basic.sh

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hg: jdk7/tl/jdk: 4421494: infinite loop while parsing double literal
by alan.bateman＠oracle.com 08 Feb '11

08 Feb '11

Changeset: 82c8c54ac1d5 Author: alanb Date: 2011-02-08 19:31 +0000 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/82c8c54ac1d5 4421494: infinite loop while parsing double literal Reviewed-by: darcy, alanb Contributed-by: dmitry.nadezhin(a)oracle.com ! src/share/classes/sun/misc/FloatingDecimal.java ! test/java/lang/Double/ParseDouble.java

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hg: jdk7/tl/jdk: 7013585: Dual-pivot quicksort improvements for highly structured (nearly sorted) and data with small periods
by alan.bateman＠oracle.com 08 Feb '11

08 Feb '11

Changeset: 947ce00ed7a2 Author: alanb Date: 2011-02-08 15:50 +0000 URL: http://hg.openjdk.java.net/jdk7/tl/jdk/rev/947ce00ed7a2 7013585: Dual-pivot quicksort improvements for highly structured (nearly sorted) and data with small periods Reviewed-by: mduigou, alanb Contributed-by: vladimir.yaroslavskiy(a)oracle.com ! src/share/classes/java/util/DualPivotQuicksort.java ! test/java/util/Arrays/Sorting.java

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