Internal caching of encoded/decoded Redisson keys

We are experimenting some performance issue in our Redisson architecture due to the codec encode and decode phases.

Changing codec works a little but is not enought, so we are in mind to avoid completely that phase if it's already been done before, storing the encoded/decoded value in a map in our custom coded.

For example:

    private final Map<Object, ByteBuf> encodedKeys = new FixedSizeMap<Object, ByteBuf>(1000);    @Override    public ByteBuf encode(Object in) throws IOException {        ByteBuf key = encodedKeys.get(in);        if (in != null) {            return key;        }        ByteBuf out = ByteBufAllocator.DEFAULT.buffer();        ByteBufOutputStream os = new ByteBufOutputStream(out);        FSTObjectOutput oos = config.getObjectOutput(os);        try {            oos.writeObject(in);            oos.flush();            key = os.buffer();            encodedKeys.put(in, key);            return key;        } catch (IOException e) {            out.release();            throw e;        } catch (Exception e) {            out.release();            throw new IOException(e);        } finally {            if (!useCache) {                oos.resetForReUse(emptyArray);            }        }    }};

It this a good practice?

There is already any developed coded that does something like this?