mirror of
https://github.com/golang/go
synced 2024-11-15 00:20:30 -07:00
53fd522c0d
Follows suit with https://go-review.googlesource.com/#/c/20111. Generated by running $ grep -R 'Go Authors. All' * | cut -d":" -f1 | while read F;do perl -pi -e 's/Go Authors. All/Go Authors. All/g' $F;done The code in cmd/internal/unvendor wasn't changed. Fixes #15213 Change-Id: I4f235cee0a62ec435f9e8540a1ec08ae03b1a75f Reviewed-on: https://go-review.googlesource.com/21819 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
42 lines
848 B
Go
42 lines
848 B
Go
// Copyright 2012 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// This benchmark, taken from the shootuot, tests floating point performance.
|
|
|
|
package go1
|
|
|
|
import "testing"
|
|
|
|
func mandelbrot(n int) int {
|
|
const Iter = 50
|
|
const Zero float64 = 0
|
|
const Limit = 2.0
|
|
ok := 0
|
|
for y := 0; y < n; y++ {
|
|
for x := 0; x < n; x++ {
|
|
Zr, Zi, Tr, Ti := Zero, Zero, Zero, Zero
|
|
Cr := (2*float64(x)/float64(n) - 1.5)
|
|
Ci := (2*float64(y)/float64(n) - 1.0)
|
|
|
|
for i := 0; i < Iter && (Tr+Ti <= Limit*Limit); i++ {
|
|
Zi = 2*Zr*Zi + Ci
|
|
Zr = Tr - Ti + Cr
|
|
Tr = Zr * Zr
|
|
Ti = Zi * Zi
|
|
}
|
|
|
|
if Tr+Ti <= Limit*Limit {
|
|
ok++
|
|
}
|
|
}
|
|
}
|
|
return ok
|
|
}
|
|
|
|
func BenchmarkMandelbrot200(b *testing.B) {
|
|
for i := 0; i < b.N; i++ {
|
|
mandelbrot(200)
|
|
}
|
|
}
|