0bea8ecf5d
In nioBuffer(int,int) in CompositeByteBuf , we create a sub-array of nioBuffers for the components that are in range, then concatenate all the components in range into a single bigger buffer. However, if the call to nioBuffers() returned only one sub-buffer, then we are copying it to a newly-allocated buffer "merged" for no reason. Motivation: Profiler for Spark shows a lot of time spent in put() method inside nioBuffer(), while usually no copy of data is required. Modification: This change skips this last step and just returns a duplicate of the single buffer returned by the call to nioBuffers(), which will in most implementation not copy the data Result: No copy when the source is only 1 buffer |
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pom.xml |