[GoLand] Profiler just says "no sampling data"
Completed
I'd like to run the CPU profiler on my project in GoLand, but when I invoke it, I just get a message saying "no sampling data".
Here's how to reproduce:
Create a new project and then create profilin.go and profilin_test.go like so:
// profilin.go
package main
import "fmt"
func DoNothing() {
fmt.Println("Hello")
}
func main() {
DoNothing()
}
// profilin_test.go
package main
import "testing"
func TestNothing(t *testing.T) {
DoNothing()
}
Then right click the play button on TestNothing, and select "Profile 'TestNothing in profi...' with 'CPU Profiler'"
I see the Profiler panel pop up at the bottom saying "No sampling data".
Is there a step that I'm missing?
Please sign in to leave a comment.
Hello Andrew,
In your example, the code executes so fast that it doesn't generate useful profiling information.
Do you get the same result on a real-world example? For example, the following benchmark should generate profiling information:
func BenchmarkDoNothing(b *testing.B) {for i := 0; i < b.N; i++ {
DoNothing()
}
}
Thanks! That makes sense and that fixes it!