IGNITE-13856
The performance improvement addresses the superlinear performance issue in the writeMessage method of DirectByteBufferStreamImplV2 caused by multiple invocations of msg.writeTo(), especially problematic for GridH2String instances.
The root cause lies in the multiple invocations of msg.writeTo(), leading to redundant val.getBytes() calls for GridH2String, resulting in elevated CPU and RAM usage.
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