相同逻辑的php与golang代码效率对比，最好语言落谁家… _php

业务逻辑：
【相同逻辑的php与golang代码效率对比，最好语言落谁家…】逐行读取一个3.6MB的文件，
把每行的字符串切割成数组，
计算二维数组中的经纬度值与目标地点的经纬度的距离，
符合限定距离范围的结果存入map中，
将结果覆盖写入一个新的文件，
计算程序执行的时间。

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php版：

<?php$stime=microtime(true);const BJ_LAT = 39.9041999;const BJ_LNG = 116.4073963;const DISTANCE = 100;$handle = fopen('air_route_data.txt','rb+');$result = [];while(!feof($handle)){$lines = fgets($handle);$airRoute = explode(' ',$lines);$lat = (float)$airRoute[3];$lng = (float)str_replace(array("rn", "r", "n"), "", $airRoute[4]);$distance = getDistance($lat,$lng);if ($distance <= DISTANCE){$result[$airRoute[2]] = ['lat'=>$lat,'lng'=>$lng ];}}fclose($handle);$jsonString = json_encode($result,JSON_UNESCAPED_UNICODE);file_put_contents('bjs_route_data.txt',$jsonString);//$handle2 = fopen('bjs_route_data.txt',"w+");//fwrite($handle2,$jsonString);//fclose($handle2);$etime=microtime(true);$total=$etime-$stime;//计算差值//echo "当前页面执行时间为：{$total} 秒";$ms = $total*1000;echo "当前页面执行时间为：{$ms} 毫秒";function getDistance($lat1, $lng1, $lat2=39.9041999, $lng2=116.4073963){$EARTH_RADIUS = 6378.137;$radLat1 = rad($lat1);$radLat2 = rad($lat2);$a = $radLat1 - $radLat2;$b = rad($lng1) - rad($lng2);$s = 2 * asin(sqrt(pow(sin($a / 2), 2) + cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2)));$s = $s * $EARTH_RADIUS;$s = round($s * 100) / 100;return $s;}function rad($d){return $d * M_PI / 180.0;}

没有启动Nginx，走php-fpm，直接从命令行执行的。
php执行时间：

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测试N次，大约在116ms左右
go版：

package mainimport (	"bufio"	"encoding/json"	"fmt"	"io"	"math"	"os"	"strconv"	"strings"	"time")//北京经纬度const BJ_LAT = 39.9041999const BJ_LNG = 116.4073963const DISTANCE = 100type Location struct {	Lat float64 `json:"lat"`	Lng float64 `json:"lng"`}func main() {	t := time.Now()	fi, err := os.Open("air_route_data.txt")	if err != nil {fmt.Printf("Error: %sn", err)return	}	defer fi.Close()	result := make(map[string]*Location)	//result := make(map[string]Location)	br := bufio.NewReader(fi)	for {data, _, c := br.ReadLine()if c == io.EOF {break}airRoute := strings.Fields(string(data))lat,_ := strconv.ParseFloat(airRoute[3],64)lng , _ := strconv.ParseFloat(airRoute[4],64)if lng < 0 || lat < 0 {continue}distance := GetDistance(lat,lng , BJ_LAT,BJ_LNG)if distance <= DISTANCE {//写数据temp := new(Location)temp.Lat = lattemp.Lng = lngresult[airRoute[2]] = temp//result[airRoute[2]] = Location{lat,lng}}	}	//写文件	jsonString, _ := json.Marshal(result)	f, _ := os.OpenFile("bjs_route_data.txt", os.O_TRUNC | os.O_WRONLY , 0666) //打开文件	io.WriteString(f,string(jsonString))	defer f.Close()elapsed := time.Since(t)	fmt.Println("当前页面执行时间为:", elapsed)}// 返回单位，千米func GetDistance(lon1, lat1, lon2, lat2 float64) (distance float64) {	//赤道半径(单位m)	const EARTH_RADIUS = 6378.137	rad_lat1 := rad(lat1)	rad_lon1 := rad(lon1)	rad_lat2 := rad(lat2)	rad_lon2 := rad(lon2)	if rad_lat1 < 0 {rad_lat1 = math.Pi/2 + math.Abs(rad_lat1)	}	if rad_lat1 > 0 {rad_lat1 = math.Pi/2 - math.Abs(rad_lat1)	}	if rad_lon1 < 0 {rad_lon1 = math.Pi*2 - math.Abs(rad_lon1)	}	if rad_lat2 < 0 {rad_lat2 = math.Pi/2 + math.Abs(rad_lat2)	}	if rad_lat2 > 0 {rad_lat2 = math.Pi/2 - math.Abs(rad_lat2)	}	if rad_lon2 < 0 {rad_lon2 = math.Pi*2 - math.Abs(rad_lon2)	}	x1 := EARTH_RADIUS * math.Cos(rad_lon1) * math.Sin(rad_lat1)	y1 := EARTH_RADIUS * math.Sin(rad_lon1) * math.Sin(rad_lat1)	z1 := EARTH_RADIUS * math.Cos(rad_lat1)	x2 := EARTH_RADIUS * math.Cos(rad_lon2) * math.Sin(rad_lat2)	y2 := EARTH_RADIUS * math.Sin(rad_lon2) * math.Sin(rad_lat2)	z2 := EARTH_RADIUS * math.Cos(rad_lat2)	d := math.Sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) + (z1-z2)*(z1-z2))	theta := math.Acos((EARTH_RADIUS*EARTH_RADIUS + EARTH_RADIUS*EARTH_RADIUS - d*d) / (2 * EARTH_RADIUS * EARTH_RADIUS))	distance = theta * EARTH_RADIUS	return}//转化为弧度(rad)func rad(d float64) (r float64) {	r = d * math.Pi / 180.0	return}

没有go build或者go install，直接使用go run执行。
go执行时间：