It is assumed that the bucket contains files one.mp3, two.mp3 and three.mp3.
To benchmark two files being concatenated:
BUCKET="https://s3-us-west-2.amazonaws.com/somebucket/optional-path" go test -bench=BenchmarkConcat2 -count=10
To benchmark three files being concatenated:
BUCKET="https://s3-us-west-2.amazonaws.com/somebucket/optional-path" go test -bench=BenchmarkConcat3 -count=10
Tests can be run in the usual way:
BUCKET="https://s3-us-west-2.amazonaws.com/somebucket/optional-path" go test ./...