go/internal/gcimporter: use saferio.ReadData instead of io.ReadAll when possible
saferio.ReadData avoids unnecessary allocations because the buffer can be
preallocated with the right size (up to a limit) instead of having to resize
and copy it step by step.
Change-Id: Id70f6908971d4f126c601a9571ac3c67ea0accdc
Reviewed-on: https://go-review.googlesource.com/c/go/+/481616 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>