Klaus Post 86e0d272f3 Reduce WriteAll allocs (#10810) ...

WriteAll saw 127GB allocs in a 5 minute timeframe for 4MiB buffers 
used by `io.CopyBuffer` even if they are pooled.

Since all writers appear to write byte buffers, just send those 
instead and write directly. The files are opened through the `os` 
package so they have no special properties anyway.

This removes the alloc and copy for each operation.

REST sends content length so a precise alloc can be made.

2020-11-02 16:14:31 -08:00

8.4 KiB

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