Github user tedyu commented on a diff in the pull request:
https://github.com/apache/spark/pull/5897#discussion_r29639524
--- Diff:
unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSetMethods.java ---
@@ -71,7 +72,13 @@ public static boolean isSet(Object baseObject, long
baseOffset, int index) {
* Returns {@code true} if any bit is set.
*/
public static boolean anySet(Object baseObject, long baseOffset, long
bitSetWidthInBytes) {
- for (int i = 0; i <= bitSetWidthInBytes; i++) {
+ int widthInLong = (int)(bitSetWidthInBytes / SIZE_OF_LONG);
+ for (int i = 0; i <= widthInLong; i++) {
+ if (PlatformDependent.UNSAFE.getLong(baseObject, baseOffset + i) !=
0) {
+ return true;
+ }
+ }
+ for (int i = (int)(SIZE_OF_LONG * widthInLong); i <
bitSetWidthInBytes; i++) {
--- End diff --
That case is covered by the first loop.
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