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74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
//go:build pprof
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// +build pprof
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package fzf
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import (
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"fmt"
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"os"
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"runtime"
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"runtime/pprof"
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"github.com/junegunn/fzf/src/util"
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)
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func (o *Options) initProfiling() error {
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if o.CPUProfile != "" {
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f, err := os.Create(o.CPUProfile)
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if err != nil {
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return fmt.Errorf("could not create CPU profile: %w", err)
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}
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if err := pprof.StartCPUProfile(f); err != nil {
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return fmt.Errorf("could not start CPU profile: %w", err)
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}
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util.AtExit(func() {
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pprof.StopCPUProfile()
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if err := f.Close(); err != nil {
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fmt.Fprintln(os.Stderr, "Error: closing cpu profile:", err)
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}
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})
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}
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stopProfile := func(name string, f *os.File) {
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if err := pprof.Lookup(name).WriteTo(f, 0); err != nil {
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fmt.Fprintf(os.Stderr, "Error: could not write %s profile: %v\n", name, err)
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}
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if err := f.Close(); err != nil {
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fmt.Fprintf(os.Stderr, "Error: closing %s profile: %v\n", name, err)
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}
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}
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if o.MEMProfile != "" {
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f, err := os.Create(o.MEMProfile)
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if err != nil {
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return fmt.Errorf("could not create MEM profile: %w", err)
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}
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util.AtExit(func() {
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runtime.GC()
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stopProfile("allocs", f)
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})
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}
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if o.BlockProfile != "" {
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runtime.SetBlockProfileRate(1)
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f, err := os.Create(o.BlockProfile)
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if err != nil {
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return fmt.Errorf("could not create BLOCK profile: %w", err)
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}
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util.AtExit(func() { stopProfile("block", f) })
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}
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if o.MutexProfile != "" {
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runtime.SetMutexProfileFraction(1)
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f, err := os.Create(o.MutexProfile)
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if err != nil {
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return fmt.Errorf("could not create MUTEX profile: %w", err)
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}
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util.AtExit(func() { stopProfile("mutex", f) })
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}
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return nil
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}
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