[JVM] Necromance a cheaper (de)serialization

3rdparty/lz4/LICENSE.txt

@@ -0,0 +1,202 @@
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src/vm/jvm/runtime/org/raku/nqp/jast2bc/JASTCompiler.java

@@ -1,5 +1,6 @@
 package org.raku.nqp.jast2bc;
 
+import java.io.File;
 import java.io.FileOutputStream;
 
 import java.lang.invoke.CallSite;
@@ -13,6 +14,9 @@
 import java.util.jar.JarOutputStream;
 import java.util.jar.Manifest;
 
+import java.util.zip.CRC32;
+import java.util.zip.ZipEntry;
+
 import org.objectweb.asm.AnnotationVisitor;
 import org.objectweb.asm.ClassWriter;
 import org.objectweb.asm.Handle;
@@ -26,6 +30,9 @@
 import org.raku.nqp.sixmodel.SixModelObject;
 import org.raku.nqp.runtime.Ops;
 
+import net.jpountz.lz4.LZ4Factory;
+import net.jpountz.lz4.LZ4CompressorWithLength;
+
 public class JASTCompiler {
     public static JavaClass buildClass(SixModelObject jast, SixModelObject jastNodes, boolean split, ThreadContext tc) {
         try {
@@ -40,6 +47,13 @@ public static JavaClass buildClass(SixModelObject jast, SixModelObject jastNodes
         }
     }
 
+    private static final LZ4CompressorWithLength lz4 =
+        new LZ4CompressorWithLength(LZ4Factory.fastestInstance().highCompressor(8));
+    // The lower the compression level, the faster the serialization, at the
+    // expense of deserialization and disk space; the higher the compression
+    // level, the lower the disk space, at the expense of both serialization
+    // and deserialization. 8 is a sweet spot of sorts.
+
     public static void writeClass(SixModelObject jast, SixModelObject jastNodes, String filename, ThreadContext tc) {
         JavaClass c = buildClass(jast, jastNodes, false, tc);
         try {
@@ -51,17 +65,29 @@ public static void writeClass(SixModelObject jast, SixModelObject jastNodes, Str
             } else {
                 // writing a jar
                 Manifest mf = new Manifest();
-
-                mf.getMainAttributes().put( Attributes.Name.MANIFEST_VERSION, "1.0" );
+                mf.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
                 if (c.hasMain)
-                    mf.getMainAttributes().put( Attributes.Name.MAIN_CLASS, c.name );
-
+                    mf.getMainAttributes().put(Attributes.Name.MAIN_CLASS, c.name);
                 JarOutputStream jos = new JarOutputStream(fos, mf);
 
-                jos.putNextEntry(new JarEntry(c.name.replace('.','/') + ".class"));
+                JarEntry jec = new JarEntry(c.name + ".class");
+                jec.setComment(c.name.replace(File.pathSeparatorChar, '.'));
+                jos.putNextEntry(jec);
                 jos.write(c.bytes);
-                jos.putNextEntry(new JarEntry(c.name.replace('.','/') + ".serialized"));
-                jos.write(c.serialized);
+                jos.closeEntry();
+
+                byte[] digest = lz4.compress(c.serialized);
+                CRC32 cipher = new CRC32();
+                cipher.update(digest, 0, digest.length);
+
+                JarEntry jes = new JarEntry(c.name + ".serialized.lz4");
+                jes.setMethod(ZipEntry.STORED);
+                jes.setSize(digest.length);
+                jes.setCompressedSize(digest.length);
+                jes.setCrc(cipher.getValue());
+                jos.putNextEntry(jes);
+                jos.write(digest);
+                jos.closeEntry();
 
                 jos.close();
             }

src/vm/jvm/runtime/org/raku/nqp/runtime/ByteClassLoader.java

@@ -1,6 +1,19 @@
 package org.raku.nqp.runtime;
 
+import java.lang.ref.SoftReference;
+import java.util.concurrent.CopyOnWriteArraySet;
+import java.util.Map;
+import java.util.Hashtable;
+import java.util.Set;
+import java.util.WeakHashMap;
+
 public class ByteClassLoader extends ClassLoader {
+    private final Set<String> refs = new CopyOnWriteArraySet< >();
+
+    private final Map<ClassLoader, String> read = new WeakHashMap< >();
+
+    private final Map<String, SoftReference<Class<?>>> made = new Hashtable< >();
+
     public ByteClassLoader() {
         super();
     }
@@ -9,7 +22,43 @@ public ByteClassLoader(ClassLoader parent) {
         super(parent);
     }
 
-    public Class<?> defineClass(String name, byte[] bytes) {
-        return defineClass(name, bytes, 0, bytes.length);
+    public boolean addRef(String name) {
+        return refs.add(name);
+    }
+
+    public Class<?> getMade(String name) {
+        if (name != null && made.containsKey(name))
+            return made.get(name).get();
+        return null;
+    }
+
+    public Class<?> setMade(String name, Class<?> klass) {
+        if (name == null)
+            name = klass.getName();
+        made.put(name, new SoftReference(klass));
+        return klass;
+    }
+
+    public Class<?> getRead(ClassLoader child, String name) {
+        if (name != null && made.containsKey(name))
+            return made.get(name).get();
+        if (child != null && read.containsKey(child))
+            if (made.containsKey(name = read.get(child)))
+                return made.get(name).get();
+        return null;
+    }
+
+    public Class<?> setRead(ClassLoader child, String name, Class<?> klass) {
+        if (name == null)
+            name = klass.getName();
+        if (child != null)
+            read.put(child, name);
+        made.put(name, new SoftReference(klass));
+        return klass;
+    }
+
+    public Class<?> defineClass(String name, byte[] bytes) throws ClassFormatError {
+        Class<?> made = getMade(name);
+        return made == null ? setMade(name, defineClass(name, bytes, 0, bytes.length)) : made;
     }
 }

src/vm/jvm/runtime/org/raku/nqp/runtime/GlobalContext.java

@@ -5,7 +5,6 @@
 import java.io.UnsupportedEncodingException;
 import java.lang.ref.WeakReference;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Timer;
 import java.util.WeakHashMap;
 
@@ -171,11 +170,6 @@ public class GlobalContext {
      */
     public HashMap<String, SixModelObject> scRefs;
 
-    /**
-     * Set of library filenames which have been loaded so far.
-     */
-    public HashSet<String> loaded;
-
     /**
      * Whether to dump VM-level stack traces for all exceptions.
      */
@@ -241,7 +235,6 @@ public GlobalContext()
         scRefs = new HashMap<String, SixModelObject>();
         compilerRegistry = new HashMap<String, SixModelObject>();
         hllSyms = new HashMap<String, HashMap<String, SixModelObject>>();
-        loaded = new HashSet<String>();
 
         contConfigs = new HashMap<String, ContainerConfigurer>();
         contConfigs.put("code_pair", new CodePairContainerConfigurer());