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package benchmark
import (
"errors"
"fmt"
"runtime/debug"
"testing"
"github.com/joomcode/errorx"
)
var errorSink error
func BenchmarkSimpleError10(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(10, createSimpleError)
}
consumeResult(errorSink)
}
func BenchmarkErrorxError10(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(10, createSimpleErrorxError)
}
consumeResult(errorSink)
}
func BenchmarkStackTraceErrorxError10(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(10, createErrorxError)
}
consumeResult(errorSink)
}
func BenchmarkSimpleError100(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(100, createSimpleError)
}
consumeResult(errorSink)
}
func BenchmarkErrorxError100(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(100, createSimpleErrorxError)
}
consumeResult(errorSink)
}
func BenchmarkStackTraceErrorxError100(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(100, createErrorxError)
}
consumeResult(errorSink)
}
func BenchmarkStackTraceNaiveError100(b *testing.B) {
for n := 0; n < b.N; n++ {
errorSink = function0(100, createNaiveError)
}
consumeResult(errorSink)
}
func BenchmarkSimpleErrorPrint100(b *testing.B) {
for n := 0; n < b.N; n++ {
err := function0(100, createSimpleError)
emulateErrorPrint(err)
errorSink = err
}
consumeResult(errorSink)
}
func BenchmarkErrorxErrorPrint100(b *testing.B) {
for n := 0; n < b.N; n++ {
err := function0(100, createSimpleErrorxError)
emulateErrorPrint(err)
errorSink = err
}
consumeResult(errorSink)
}
func BenchmarkStackTraceErrorxErrorPrint100(b *testing.B) {
for n := 0; n < b.N; n++ {
err := function0(100, createErrorxError)
emulateErrorPrint(err)
errorSink = err
}
consumeResult(errorSink)
}
func BenchmarkStackTraceNaiveErrorPrint100(b *testing.B) {
for n := 0; n < b.N; n++ {
err := function0(100, createNaiveError)
emulateErrorPrint(err)
errorSink = err
}
consumeResult(errorSink)
}
func createSimpleError() error {
return errors.New("benchmark")
}
var (
Errors = errorx.NewNamespace("errorx.benchmark")
NoStackTraceError = Errors.NewType("no_stack_trace").ApplyModifiers(errorx.TypeModifierOmitStackTrace)
StackTraceError = Errors.NewType("stack_trace")
)
func createSimpleErrorxError() error {
return NoStackTraceError.New("benchmark")
}
func createErrorxError() error {
return StackTraceError.New("benchmark")
}
type naiveError struct {
stack []byte
}
func (err naiveError) Error() string {
return fmt.Sprintf("benchmark\n%s", err.stack)
}
func createNaiveError() error {
return naiveError{stack: debug.Stack()}
}
func function0(depth int, generate func() error) error {
if depth == 0 {
return generate()
}
switch depth % 3 {
case 0:
return function1(depth-1, generate)
case 1:
return function2(depth-1, generate)
default:
return function3(depth-1, generate)
}
}
func function1(depth int, generate func() error) error {
if depth == 0 {
return generate()
}
return function4(depth-1, generate)
}
func function2(depth int, generate func() error) error {
if depth == 0 {
return generate()
}
return function4(depth-1, generate)
}
func function3(depth int, generate func() error) error {
if depth == 0 {
return generate()
}
return function4(depth-1, generate)
}
func function4(depth int, generate func() error) error {
switch depth {
case 0:
return generate()
default:
return function0(depth-1, generate)
}
}
type sinkError struct {
value int
}
func (sinkError) Error() string {
return ""
}
// Perform error formatting and consume the result to disallow optimizations against output
func emulateErrorPrint(err error) {
output := fmt.Sprintf("%+v", err)
if len(output) > 10000 && output[1000:1004] == "DOOM" {
panic("this was not supposed to happen")
}
}
// Consume error with a possible side effect to disallow optimizations against err
func consumeResult(err error) {
if e, ok := err.(sinkError); ok && e.value == 1 {
panic("this was not supposed to happen")
}
}
// A public function to discourage optimizations against errorSink variable
func ExportSink() error {
return errorSink
}
|
