According to https://github.com/golang/go/issues/5373, go recognizes
(and optimizes for) the following syntax:
```go
for i := range b {
b[i] = 0
}
```
so let's use it. Limited testing shows ~7.5x speed increase,
compared to the previously used syntax.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Upstream-commit: f0cab0e28512de5eecc0412212425cc74d62af71
Component: engine
This helper acts like /dev/zero (outputs \x00 indefinitely) in an
OS-independent fashion. This ensures we don't need to special-case
around Windows in tests that want to open /dev/zero.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Upstream-commit: 2f8d3e1c33f77187c68893803018756d43daff15
Component: engine
