It uses slightly less memory and more understandable.
Benchmar results:
benchmark old ns/op new ns/op delta
BenchmarkPutter-4 57272 52375 -8.55%
benchmark old allocs new allocs delta
BenchmarkPutter-4 21 19 -9.52%
benchmark old bytes new bytes delta
BenchmarkPutter-4 19416 13336 -31.31%
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
