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profiling.go
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profiling.go
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package profilex
import (
"os"
"github.com/pkg/profile"
)
type noop struct{}
// Stop is a noop.
func (p *noop) Stop() {}
// Profile parses the PROFILING environment variable and executes the proper profiling task.
func Profile() interface {
Stop()
} {
switch os.Getenv("PROFILING") {
case "cpu":
return profile.Start(profile.CPUProfile, profile.NoShutdownHook)
case "mem":
return profile.Start(profile.MemProfile, profile.NoShutdownHook)
case "mutex":
return profile.Start(profile.MutexProfile, profile.NoShutdownHook)
case "block":
return profile.Start(profile.BlockProfile, profile.NoShutdownHook)
}
return new(noop)
}
// HelpMessage returns a string explaining how profiling works.
func HelpMessage() string {
return `- PROFILING: Set "PROFILING=cpu" to enable cpu profiling and "PROFILING=mem" to enable memory profiling.
It is not possible to do both at the same time. Profiling is disabled per default.
Example: PROFILING=cpu`
}