Avoids allocations and copying by using a buffer pool for intermediate
writes.
```
benchmark old ns/op new ns/op delta
BenchmarkWrite-8 996 175 -82.43%
benchmark old MB/s new MB/s speedup
BenchmarkWrite-8 4414.48 25069.46 5.68x
benchmark old allocs new allocs delta
BenchmarkWrite-8 2 0 -100.00%
benchmark old bytes new bytes delta
BenchmarkWrite-8 4616 0 -100.00%
```
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 2f3b6022858aab2d70e380d126e6dcec227c0d38
Component: engine
Stop using global variables as prefixes to inject the writer header.
That can cause issues when two writers set the length of the buffer in
the same header concurrently.
Stop Writing to the internal buffer twice for each write. This could
mess up with the ordering information is written.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Upstream-commit: 443a5c20216b5331b1bb57796140c0178ca44b7d
Component: engine
pkg/stdcopy NewStdWriter function has wrong doc comment,
utils is not correct, it should be stdcopy
Signed-off-by: Deshi Xiao <xiaods@gmail.com>
Upstream-commit: a715b0e31beabed9ac5702af2ede619b4232cbdb
Component: engine
