xtrabackup: Add a buffered reader in front of xtrabackup's stdout pipe.#5666
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deepthi merged 1 commit intovitessio:masterfrom Jan 9, 2020
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The buffered reader implements WriteTo(), which allows io.CopyN() to avoid allocating a new buffer every time. Signed-off-by: Anthony Yeh <enisoc@planetscale.com>
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The buffered reader implements
WriteTo(), which allowsio.CopyN()to avoid allocating a new buffer every time.From the flamegraph in #5613, we can see that there is a decent-sized chunk attributed directly to
io.copyBuffer(excluding its descendants). This change should eliminate that one section, although it's unlikely this is the real cause of #5613.