Update references to xxHash32 (not xxHash64)

Author: bp-alex

README.md

@@ -34,9 +34,7 @@ The benchmark includes:
 * Reading all data via a reverse iterator
 * Reading all data via a forward iterator
 * Reading all data via a forward iterator and computing a CRC32 (via JDK API)
-* Reading all data via a forward iterator and computing a XXH64
-  (via [extremely fast](https://github.com/benalexau/hash-bench)
-  [Zero-Allocation-Hashing](https://github.com/OpenHFT/Zero-Allocation-Hashing))
+* Reading all data via a forward iterator and computing a XXH32 hash
 
 Byte arrays (`byte[]`) are always used for the keys and values, avoiding any
 serialization library overhead. For those libraries that support compression,

src/main/java/org/lmdbjava/bench/LevelDb.java

@@ -106,7 +106,7 @@ public void readSeq(final Reader r, final Blackhole bh) throws IOException {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) throws IOException {
+  public void readXxh32(final Reader r, final Blackhole bh) throws IOException {
     long result = 0;
     try (DBIterator iterator = r.db.iterator()) {
       for (iterator.seekToFirst(); iterator.hasNext(); iterator.next()) {

src/main/java/org/lmdbjava/bench/LmdbJavaAgrona.java

@@ -108,7 +108,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     bh.consume(r.c.seek(MDB_FIRST));
     do {

src/main/java/org/lmdbjava/bench/LmdbJavaByteBuffer.java

@@ -104,7 +104,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     bh.consume(r.c.seek(MDB_FIRST));
     do {

src/main/java/org/lmdbjava/bench/LmdbJni.java

@@ -107,7 +107,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     bh.consume(r.c.first());
     do {

src/main/java/org/lmdbjava/bench/LmdbLwjgl.java

@@ -149,7 +149,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     try (MemoryStack stack = stackPush()) {
       final MDBVal key = mallocStack(stack);
       final MDBVal val = mallocStack(stack);

src/main/java/org/lmdbjava/bench/MapDb.java

@@ -101,7 +101,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     final Iterator<Entry<byte[], byte[]>> iterator = r.map.entryIterator();
     while (iterator.hasNext()) {

src/main/java/org/lmdbjava/bench/MvStore.java

@@ -103,7 +103,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     final Cursor<byte[], byte[]> cursor = r.map.cursor(null, null, false);
     while (cursor.hasNext()) {

src/main/java/org/lmdbjava/bench/RocksDb.java

@@ -107,7 +107,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     final RocksIterator iterator = r.db.newIterator();
     iterator.seekToFirst();

src/main/java/org/lmdbjava/bench/Xodus.java

@@ -109,7 +109,7 @@ public void readSeq(final Reader r, final Blackhole bh) {
   }
 
   @Benchmark
-  public void readXxh64(final Reader r, final Blackhole bh) {
+  public void readXxh32(final Reader r, final Blackhole bh) {
     long result = 0;
     try (Cursor c = r.store.openCursor(r.tx)) {
       while (c.getNext()) {