Go: improved coro-sine-sieve (add 2.go)

bench/algorithm/coro-prime-sieve/2.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+)
+
+//        get r3kt.
+//    - yung innanet
+
+func SieveOfEratosthenes(out io.Writer) {
+	sieve := make([]bool, 20000)
+	p := 2
+
+	for {
+		if !sieve[p] {
+			_, _ = fmt.Fprintln(out, p)
+			for multiple := p * p; multiple <= len(sieve)-1; multiple += p {
+				sieve[multiple] = true
+			}
+		}
+		p++
+		if p > len(sieve)-1 {
+			return
+		}
+	}
+}
+
+func main() {
+	n := 1000
+	if len(os.Args) > 1 {
+		if _n, err := strconv.Atoi(os.Args[1]); err == nil {
+			n = _n
+		}
+	}
+	pipeIn, pipeOut := io.Pipe()
+
+	out := bufio.NewWriter(os.Stdout)
+	in := bufio.NewWriter(pipeOut)
+
+	readerUntil := bufio.NewReader(pipeIn)
+	go SieveOfEratosthenes(in)
+
+	rd := func() []byte {
+		b, _ := readerUntil.ReadSlice('\n')
+		return b
+	}
+
+	i := 0
+	for {
+		if i >= n {
+			break
+		}
+		_, _ = out.Write(rd())
+		i++
+	}
+	_ = out.Flush()
+}

bench/bench_go.yaml

@@ -45,6 +45,7 @@ problems:
   - name: coro-prime-sieve
     source:
       - 1.go
+      - 2.go
   - name: http-server
     source:
       - 1.go

bench/bench_go_tinygo.yaml

@@ -40,6 +40,7 @@ problems:
   - name: coro-prime-sieve
     source:
       - 1.go
+      - 2.go
   # - name: json-serde
   #   source:
   #     - 1.go