$ go version
go version devel +b817359 Sat Jul 22 01:29:58 2017 +0000 linux/amd64
$ rm -rf data
$ ls -la data
ls: cannot access 'data': No such file or directory
$ go test -v -run=! -bench=. -benchmem parser_test.go
2017/07/23 02:42:09 big input size: 117265882, normal input size: 763, deep input size: 2134832
goos: linux
goarch: amd64
BenchmarkUnmarshalBigInput-4               1    1107362634 ns/op    278192256 B/op   8280859 allocs/op
BenchmarkSimpleJsonBigInput-4              1    2680878194 ns/op    569595680 B/op   7575252 allocs/op
BenchmarkUnmarshalNormalInput-4       300000          5685 ns/op        4622 B/op        129 allocs/op
BenchmarkSimpleJsonNormalInput-4      200000          9565 ns/op        5602 B/op         87 allocs/op
BenchmarkUnmarshalDeepInput-4           1000       2085186 ns/op      372922 B/op       5134 allocs/op
BenchmarkSimpleJsonDeepInput-4           100      12311435 ns/op     8911102 B/op       6117 allocs/op
PASS
ok      command-line-arguments  15.067s
$ ls -la datatotal 116620
drwxr-xr-x 2 peter peter      4096 Jul 23 02:42 .
drwxr-xr-x 5 peter peter      4096 Jul 23 02:42 ..
-rwxr-xr-x 1 peter peter 117265882 Jul 23 02:42 big.json
-rwxr-xr-x 1 peter peter   2134832 Jul 23 02:42 deep.json
-rwxr-xr-x 1 peter peter       763 Jul 23 02:42 normal.json
$ go test -v -run=! -bench=. -benchmem parser_test.go
2017/07/23 02:42:31 big input size: 117265882, normal input size: 763, deep input size: 2134832
goos: linux
goarch: amd64
BenchmarkUnmarshalBigInput-4               1    1140498937 ns/op    278220704 B/op   8280995 allocs/op
BenchmarkSimpleJsonBigInput-4              1    2685285322 ns/op    569592608 B/op   7575242 allocs/op
BenchmarkUnmarshalNormalInput-4       300000          5685 ns/op        4622 B/op        129 allocs/op
BenchmarkSimpleJsonNormalInput-4    ^[[A  200000          9633 ns/op        5601 B/op         87 allocs/op
BenchmarkUnmarshalDeepInput-4           1000       2086891 ns/op      372927 B/op       5134 allocs/op
BenchmarkSimpleJsonDeepInput-4           100      12387413 ns/op     8911084 B/op       6117 allocs/op
PASS
ok      command-line-arguments  11.903s
$ ls -la data
total 116624
drwxr-xr-x 2 peter peter      4096 Jul 23 02:42 .
drwxr-xr-x 5 peter peter      4096 Jul 23 02:42 ..
-rwxr-xr-x 1 peter peter 117265882 Jul 23 02:42 big.json
-rwxr-xr-x 1 peter peter   2134832 Jul 23 02:42 deep.json
-rwxr-xr-x 1 peter peter       763 Jul 23 02:42 normal.json
$