diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 4f6af98..cc6789d 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -234,9 +234,8 @@
     // TODO: To handle multi-touch gestures we may want to move this method to
     // {@link PointerTrackerQueue}.
     private static InputPointers getIncrementalBatchPoints() {
-        final InputPointers pointers = new InputPointers();
-        // TODO: Add a default capacity parameter for the InputPointers' constructor.
         // TODO: Avoid creating a new instance here?
+        final InputPointers pointers = new InputPointers(GestureStroke.DEFAULT_CAPACITY);
         for (final PointerTracker tracker : sTrackers) {
             tracker.mGestureStroke.appendIncrementalBatchPoints(pointers);
         }
@@ -246,9 +245,8 @@
     // TODO: To handle multi-touch gestures we may want to move this method to
     // {@link PointerTrackerQueue}.
     private static InputPointers getAllBatchPoints() {
-        // TODO: Add a default capacity parameter for the InputPointers' constructor.
         // TODO: Avoid creating a new instance here?
-        final InputPointers pointers = new InputPointers();
+        final InputPointers pointers = new InputPointers(GestureStroke.DEFAULT_CAPACITY);
         for (final PointerTracker tracker : sTrackers) {
             tracker.mGestureStroke.appendAllBatchPoints(pointers);
         }
diff --git a/java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java b/java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java
index 14e9948..8740e69 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java
@@ -19,8 +19,11 @@
 import com.android.inputmethod.latin.InputPointers;
 
 public class GestureStroke {
+    public static final int DEFAULT_CAPACITY = 128;
+
     private final int mPointerId;
-    private final InputPointers mInputPointers = new InputPointers();
+    // TODO: Replace this {@link InputPointers} with a set of {@link ScalableIntArray}s.
+    private final InputPointers mInputPointers = new InputPointers(DEFAULT_CAPACITY);
     private float mLength;
     private float mAngle;
     private int mIncrementalRecognitionPoint;
diff --git a/java/src/com/android/inputmethod/latin/InputPointers.java b/java/src/com/android/inputmethod/latin/InputPointers.java
index 298e2b2..febabad 100644
--- a/java/src/com/android/inputmethod/latin/InputPointers.java
+++ b/java/src/com/android/inputmethod/latin/InputPointers.java
@@ -20,10 +20,19 @@
 
 // TODO: This class is not thread-safe.
 public class InputPointers {
-    private final ScalableIntArray mXCoordinates = new ScalableIntArray();
-    private final ScalableIntArray mYCoordinates = new ScalableIntArray();
-    private final ScalableIntArray mPointerIds = new ScalableIntArray();
-    private final ScalableIntArray mTimes = new ScalableIntArray();
+    private final int mDefaultCapacity;
+    private final ScalableIntArray mXCoordinates;
+    private final ScalableIntArray mYCoordinates;
+    private final ScalableIntArray mPointerIds;
+    private final ScalableIntArray mTimes;
+
+    public InputPointers(int defaultCapacity) {
+        mDefaultCapacity = defaultCapacity;
+        mXCoordinates = new ScalableIntArray(defaultCapacity);
+        mYCoordinates = new ScalableIntArray(defaultCapacity);
+        mPointerIds = new ScalableIntArray(defaultCapacity);
+        mTimes = new ScalableIntArray(defaultCapacity);
+    }
 
     public void addPointer(int index, int x, int y, int pointerId, int time) {
         mXCoordinates.add(index, x);
@@ -70,10 +79,11 @@
     }
 
     public void reset() {
-        mXCoordinates.reset();
-        mYCoordinates.reset();
-        mPointerIds.reset();
-        mTimes.reset();
+        final int defaultCapacity = mDefaultCapacity;
+        mXCoordinates.reset(defaultCapacity);
+        mYCoordinates.reset(defaultCapacity);
+        mPointerIds.reset(defaultCapacity);
+        mTimes.reset(defaultCapacity);
     }
 
     public int getPointerSize() {
@@ -97,12 +107,11 @@
     }
 
     private static class ScalableIntArray {
-        private static final int DEFAULT_SIZE = BinaryDictionary.MAX_WORD_LENGTH;
         private int[] mArray;
         private int mLength;
 
-        public ScalableIntArray() {
-            reset();
+        public ScalableIntArray(int capacity) {
+            reset(capacity);
         }
 
         public void add(int index, int val) {
@@ -136,8 +145,8 @@
             return mLength;
         }
 
-        public void reset() {
-            mArray = new int[DEFAULT_SIZE];
+        public void reset(int capacity) {
+            mArray = new int[capacity];
             mLength = 0;
         }
 
diff --git a/java/src/com/android/inputmethod/latin/LastComposedWord.java b/java/src/com/android/inputmethod/latin/LastComposedWord.java
index 974af25..bb39ce4 100644
--- a/java/src/com/android/inputmethod/latin/LastComposedWord.java
+++ b/java/src/com/android/inputmethod/latin/LastComposedWord.java
@@ -45,7 +45,7 @@
     public final String mCommittedWord;
     public final int mSeparatorCode;
     public final CharSequence mPrevWord;
-    public final InputPointers mInputPointers = new InputPointers();
+    public final InputPointers mInputPointers = new InputPointers(BinaryDictionary.MAX_WORD_LENGTH);
 
     private boolean mActive;
 
diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index ca9dbaf..6d346d1 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -33,7 +33,7 @@
     private static final int N = BinaryDictionary.MAX_WORD_LENGTH;
 
     private int[] mPrimaryKeyCodes;
-    private final InputPointers mInputPointers = new InputPointers();
+    private final InputPointers mInputPointers = new InputPointers(N);
     private final StringBuilder mTypedWord;
     private CharSequence mAutoCorrection;
     private boolean mIsResumed;
diff --git a/tests/src/com/android/inputmethod/latin/InputPointersTests.java b/tests/src/com/android/inputmethod/latin/InputPointersTests.java
index 524921e..0ab3cb9 100644
--- a/tests/src/com/android/inputmethod/latin/InputPointersTests.java
+++ b/tests/src/com/android/inputmethod/latin/InputPointersTests.java
@@ -19,8 +19,10 @@
 import android.test.AndroidTestCase;
 
 public class InputPointersTests extends AndroidTestCase {
+    private static final int DEFAULT_CAPACITY = 48;
+
     public void testNewInstance() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         assertEquals("newInstance size", 0, src.getPointerSize());
         assertNotNull("new instance xCoordinates", src.getXCoordinates());
         assertNotNull("new instance yCoordinates", src.getYCoordinates());
@@ -29,7 +31,7 @@
     }
 
     public void testReset() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int[] xCoordinates = src.getXCoordinates();
         final int[] yCoordinates = src.getXCoordinates();
         final int[] pointerIds = src.getXCoordinates();
@@ -44,7 +46,7 @@
     }
 
     public void testAdd() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int limit = src.getXCoordinates().length * 2 + 10;
         for (int i = 0; i < limit; i++) {
             src.addPointer(i, i * 2, i * 3, i * 4);
@@ -59,7 +61,7 @@
     }
 
     public void testAddAt() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int limit = 1000, step = 100;
         for (int i = 0; i < limit; i += step) {
             src.addPointer(i, i, i * 2, i * 3, i * 4);
@@ -74,12 +76,12 @@
     }
 
     public void testSet() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int limit = src.getXCoordinates().length * 2 + 10;
         for (int i = 0; i < limit; i++) {
             src.addPointer(i, i * 2, i * 3, i * 4);
         }
-        final InputPointers dst = new InputPointers();
+        final InputPointers dst = new InputPointers(DEFAULT_CAPACITY);
         dst.set(src);
         assertEquals("after set size", dst.getPointerSize(), src.getPointerSize());
         assertSame("after set xCoordinates", dst.getXCoordinates(), src.getXCoordinates());
@@ -89,12 +91,12 @@
     }
 
     public void testCopy() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int limit = 100;
         for (int i = 0; i < limit; i++) {
             src.addPointer(i, i * 2, i * 3, i * 4);
         }
-        final InputPointers dst = new InputPointers();
+        final InputPointers dst = new InputPointers(DEFAULT_CAPACITY);
         dst.copy(src);
         assertEquals("after copy size", dst.getPointerSize(), src.getPointerSize());
         assertNotSame("after copy xCoordinates", dst.getXCoordinates(), src.getXCoordinates());
@@ -113,18 +115,18 @@
     }
 
     public void testAppend() {
-        final InputPointers src = new InputPointers();
+        final InputPointers src = new InputPointers(DEFAULT_CAPACITY);
         final int srcLen = 100;
         for (int i = 0; i < srcLen; i++) {
             src.addPointer(i, i * 2, i * 3, i * 4);
         }
         final int dstLen = 50;
-        final InputPointers dst = new InputPointers();
+        final InputPointers dst = new InputPointers(DEFAULT_CAPACITY);
         for (int i = 0; i < dstLen; i++) {
             final int value = -i - 1;
             dst.addPointer(value * 4, value * 3, value * 2, value);
         }
-        final InputPointers dstCopy = new InputPointers();
+        final InputPointers dstCopy = new InputPointers(DEFAULT_CAPACITY);
         dstCopy.copy(dst);
 
         dst.append(src, 0, 0);