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pprof.go
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pprof.go
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//go:build pprof
// +build pprof
package main
import (
"os"
"runtime"
"runtime/pprof"
"github.com/lmorg/murex/debug"
"github.com/lmorg/murex/lang"
)
const (
fCpuProfile = "./cpu.pprof"
fMemProfile = "./mem.pprof"
)
func init() {
lang.ProfCpuCleanUp = cpuProfile()
lang.ProfMemCleanUp = memProfile()
}
func cpuProfile() func() {
if fCpuProfile != "" {
//fmt.Fprintf(tty.Stderr, "Writing CPU profile to '%s'\n", fCpuProfile)
f, err := os.Create(fCpuProfile)
if err != nil {
panic(err)
}
if err := pprof.StartCPUProfile(f); err != nil {
panic(err)
}
return func() {
pprof.StopCPUProfile()
if err = f.Close(); err != nil && debug.Enabled {
panic(err)
}
//fmt.Fprintf(tty.Stderr, "CPU profile written to '%s'\n", fCpuProfile)
}
}
return func() {}
}
func memProfile() func() {
if fMemProfile != "" {
//fmt.Fprintf(tty.Stderr, "Writing memory profile to '%s'\n", fMemProfile)
f, err := os.Create(fMemProfile)
if err != nil {
panic(err)
}
return func() {
runtime.GC() // get up-to-date statistics
if err := pprof.WriteHeapProfile(f); err != nil {
panic(err)
}
if err = f.Close(); err != nil {
panic(err)
}
//fmt.Fprintf(tty.Stderr, "Memory profile written to '%s'\n", fMemProfile)
}
}
return func() {}
}