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Commit 333d9757 authored by Jan Sebechlebsky's avatar Jan Sebechlebsky Committed by Ján Sebechlebský
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Do not preallocate memory in default constructor of Sparse.*Array 

By heapdump examination this saves not-an-insignificant amount of
memory and significant amount of allocations.
Similar change was also introduced for ArrayList & HashMap
implementation in JDK8.

More details in go/if-xr-android-util-collections-lazy-init.

Bug: 272467748
Test: Verified system server heapdump
Change-Id: I849dbaa46e79eae0b61b93a7ab1f5d5ef8bfbf7f
parent a27edf5a

core/java/android/util/SparseArray.java

+1 −1
Original line number Diff line number Diff line
@@ -71,7 +71,7 @@ public class SparseArray<E> implements Cloneable { 
     * Creates a new SparseArray containing no mappings.

     */

    public SparseArray() {

        this(10);

        this(0);

    }



    /**

core/java/android/util/SparseBooleanArray.java

+1 −1
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ public class SparseBooleanArray implements Cloneable { 
     * Creates a new SparseBooleanArray containing no mappings.

     */

    public SparseBooleanArray() {

        this(10);

        this(0);

    }



    /**

core/java/android/util/SparseDoubleArray.java

+1 −1
Original line number Diff line number Diff line
@@ -50,7 +50,7 @@ public class SparseDoubleArray implements Cloneable { 


    /** Creates a new SparseDoubleArray containing no mappings. */

    public SparseDoubleArray() {

        this(10);

        this(0);

    }



    /**

core/java/android/util/SparseIntArray.java

+1 −1
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ public class SparseIntArray implements Cloneable { 
     * Creates a new SparseIntArray containing no mappings.

     */

    public SparseIntArray() {

        this(10);

        this(0);

    }



    /**

core/java/android/util/SparseLongArray.java

+1 −1
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ public class SparseLongArray implements Cloneable { 
     * Creates a new SparseLongArray containing no mappings.

     */

    public SparseLongArray() {

        this(10);

        this(0);

    }



    /**