source code
/* The Computer Language Benchmarks Game
https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
line-by-line from Greg Buchholz's C program
*/
package main
import ("bufio"; "fmt"; "os"; "strconv")
func main () {
bufout := bufio.NewWriter(os.Stdout); defer bufout.Flush()
var w, h, x, y, i, bit_num int
var byte_acc byte
iter := 50
limit := 2.0
var Zr, Zi, Cr, Ci, Tr, Ti float64
w,_ = strconv.Atoi(os.Args[1])
h = w;
fmt.Printf("P4\n%d %d\n",w, h)
for y=0; y<h; y++ {
for x=0; x<w; x++ {
Zr = 0.0; Zi = 0.0
Cr = 2*float64(x)/float64(w) - 1.5; Ci = 2*float64(y)/float64(h) - 1
for i=0; i<iter; i++ {
Tr = Zr*Zr - Zi*Zi + Cr
Ti = 2*Zr*Zi + Ci
Zr = Tr; Zi = Ti
if Zr*Zr+Zi*Zi > limit*limit {
break
}
}
if Zr*Zr+Zi*Zi > limit*limit {
byte_acc = (byte_acc << 1) | 0x00
} else {
byte_acc = (byte_acc << 1) | 0x01
}
bit_num++
if bit_num == 8 {
bufout.WriteByte(byte_acc)
byte_acc = 0
bit_num = 0
} else if x == w-1 {
byte_acc = byte_acc << (8-w%8)
bufout.WriteByte(byte_acc)
byte_acc = 0
bit_num = 0
}
}
}
}
notes, command-line, and program output
NOTES:
64-bit Ubuntu quad core
go version go1.22.0 linux/amd64
GOAMD64=v2
Fri, 01 Mar 2024 23:54:31 GMT
MAKE:
/opt/src/go1.22.0/go/bin/go build -o simple.go_run simple.go
4.91s to complete and log all make actions
COMMAND LINE:
./simple.go_run 16000
(BINARY) PROGRAM OUTPUT NOT SHOWN