SuperManJin opened a new issue, #47480:
URL: https://github.com/apache/arrow/issues/47480
### Describe the usage question you have. Please include as many useful
details as possible.
I'm using Arrow Flight and discovered an extra copy action while testing
performance impact.
` ReadableBuffer readableBuffer = fastPath ? getReadableBuffer(stream) :
null;
if (readableBuffer != null) {
readableBuffer.readBytes(buf.nioBuffer(0, size));
} `
<img width="2926" height="760" alt="Image"
src="https://github.com/user-attachments/assets/e509e4e9-2e89-41be-abb7-be800603f0fa";
/>
The flame graph shows that after enabling zero_copy, ArrowBuf copying from
GetReadableBuffer causes slowness.
Why does this copy occur?
Or is it because arrowbuf needs to manage its own memory, so the ownership
must be transferred from netty?
### Component(s)
FlightRPC
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