java kryo vs fst
No packages published . If a serializer doesn't provide writeHeader, writing data for create can be done in write. The goals of the project are speed, efficiency, and an easy to use API. Serializing objects in the PHP serialization format. The forward and backward compatibility and serialization performance depends on the readUnknownFieldData and chunkedEncoding settings. The order they are added can be relevant for interfaces. When false it is assumed that no elements in the collection are null, which can save 0-1 byte per element. JVM vendors are doing their best by implementing some new JIT algorithms, but there is still a lot to do, especially in how we use Java. Reason is that generating methods at runtime with javassist fails (probably a javassist bug ..). Getting data in and out of Kryo is done using the Input and Output classes. During deserialization, the registered classes must have the exact same serializers and serializer configurations they had during serialization. Instead of using a serializer, a class can choose to do its own serialization by implementing KryoSerializable (similar to java.io.Externalizable). This is good to show what is possible, but may not be a relevant comparison for many situations. In the end we can draw a few conclusions: Unsafe serialization is greater than 23 times faster than standard use of java.io.Serializable, Use of RandomAccessFile can speed up standard buffered serialization by almost 4 times. When the buffer is full, its length is written, then the data. Changing the type of a field is not supported. Each thread should have its own Kryo, Input, and Output instances. FieldSerializer works by serializing each non-transient field. Using this, the class must implement java.io.Serializable and the first zero argument constructor in a super class is invoked. Redisson supports the Java Serialization API, as well as a variety of codecs: JSON FST JDK Serialization CBOR MsgPack Kryo Avro Smile LZ4 compression Snappy compression Unfortunately, Jedis does not support JDK serialization or any of the above codecs. If that is not possible, it uses reflection to call a zero argument constructor. When false it is assumed that no field values are null, which can save 0-1 byte per field. When Kryo is used to read a nested object in Serializer read then Kryo reference must first be called with the parent object if it is possible for the nested object to reference the parent object. Note: It is possible that some search terms could be used in multiple areas and that could skew some graphs. About If the Input is given an InputStream, it will fill the buffer from the stream when all the data in the buffer has been read. To be more concise I’ll show only the write methods (though the other way is quite similar, too). Both methods, saveAsObjectFile on RDD and objectFile method on SparkContext supports only java serialization. TaggedFieldSerializer extends FieldSerializer to provide backward compatibility and optional forward compatibility. Kryo-dynamic serialization is about 35% slower than the hand-implemented direct buffer. It extends Input, so has all the convenient methods to read data. Reflection uses setAccessible, so a private zero argument constructor can be a good way to allow Kryo to create instances of a class without affecting the public API. Tags We try to make it as safe and easy as possible. Sets the CollectionSerializer settings for Collection fields. Usually the global serializer is one that can handle many different types. When using nested serializers, KryoException can be caught to add serialization trace information. FSTStructs is very similar to IBM's packed objects. They vary from L1 to L5 with "L5" being the highest. This kind of map allocates for put but may provide better performance for object graphs with a very high number of objects. At development time binary and source compatibility is tracked with, For reporting binary and source compatibility. More serializers can be found in the links section. Kryo unregisteredClassMessage can be overridden to customize the log message or take other actions. Alternatively, some generic serializers provide methods that can be overridden to customize object creation for a specific type, instead of calling Kryo newInstance. Made by developers for developers. TaggedFieldSerializer also inherits all the settings of FieldSerializer.
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