Speedup

h2/src/main/org/h2/store/fs/FileObjectMemory.java

@@ -122,8 +122,10 @@ public class FileObjectMemory implements FileObject {
             return;
         }
         byte[] out = new byte[BLOCK_SIZE];
-        synchronized (LZF) {
-            LZF.expand(d, 0, d.length, out, 0, BLOCK_SIZE);
+        if (d != COMPRESSED_EMPTY_BLOCK) {
+            synchronized (LZF) {
+                LZF.expand(d, 0, d.length, out, 0, BLOCK_SIZE);
+            }
         }
         data[page] = out;
     }
@@ -192,7 +194,6 @@ public class FileObjectMemory implements FileObject {
             }
             data = n;
         }
-
     }
 
     private void readWrite(byte[] b, int off, int len, boolean write) throws IOException {

h2/src/main/org/h2/store/fs/FileSystemMemory.java

@@ -76,10 +76,7 @@ public class FileSystemMemory extends FileSystem {
     }
 
     public boolean tryDelete(String fileName) {
-        fileName = normalize(fileName);
-        synchronized (MEMORY_FILES) {
-            MEMORY_FILES.remove(fileName);
-        }
+        delete(fileName);
         return true;
     }