How to test only one benchmark function?

http://stackoverflow.com/questions/16161142/how-to-test-only-one-benchmark-function

Description of testing flags

-test.bench pattern
Run benchmarks matching the regular expression.
By default, no benchmarks run.

-test.run pattern
Run only those tests and examples matching the regular
expression.

For convenience, each of these 

-test.X

 flags
of the test binary is also available as the flag 

-X

 in
'

go test

'
itself.

For help,

$ go help testflag

For example,

go test -test.bench MapTravel
go test -test.bench MapGet

or

go test -bench MapTravel
go test -bench MapGet

To bypass test functions, use an improbable 

-test.run

 pattern.
For example,

go test -test.bench MapTravel -test.run XXX

or

go test -bench MapTravel -run XXX