b0feb5a81f
Motivation: Currently when use of Unsafe is disabled and an internal reallocation is performed for a direct PooledByteBuf, a one-off temporary duplicate is made of the source and destination backing nio buffers so that the copy can be done in a threadsafe manner. The need for this can be reduced by sharing the temporary duplicate buffer that is already stored in the corresponding destination PooledByteBuf instance. Modifications: Have PoolArena#memoryCopy(...) take the destination PooledByteBuf instead of the underlying mem reference and offset, and use internalNioBuffer() to obtain/initialize a reusable duplicate of the backing nio buffer. Result: Fewer temporary allocations when resizing direct pooled ByteBufs in the non-Unsafe case |
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