CODEWITHSUNDEEP
performancegotestingbenchmarking
Hrishikesh
Hrishikesh

Reputation: 345

Correct output of running Go benchmarks

When I am running a benchmark on this repository (just a placeholder for any go project) using:

 go test -run="^$" -bench="^BenchmarkLessorRevoke1000$"  ./...

The output I am getting is this, the benchmark results are shown:

BenchmarkLessorRevoke1000-8      1033351          1141 ns/op

but also with a whole bunch of other test output. how do I make it only show the benchmarks and not the test outputs?

Upvotes: 2

Views: 235

Answers (1)

Dan_
Dan_

Reputation: 1245

You can supply a dummy name to the -run parameter of the go test tool and providing you don't have any tests matching that name, then only the benchmarks should get ran.

You covered this with "^$" so all good, you are also have a pattern to match a benchmarks with "^BenchmarkLessorRevoke1000$".

The issue is that you are running go test throughout the entire package and/or subdirectories with the ./....

You should specify the benchmarks that you want to run on a per package basis.

go test -run="$^" -bench="^BenchmarkLessorRevoke1000$" .
go test -run="$^" -bench="^BenchmarkLessorRevoke1000$" ./pkg1/
go test -run="$^" -bench="^BenchmarkLessorRevoke1000$" ./pkg2/

Also be mindful, if you do want to run benchmarks in mass you should do so on a per-package basis.

Running benchmarks for multiple packages will execute them concurrently, skewing your results.

Upvotes: 4

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