commit ae9acbd83cd58e27effd3418aef804cf22760857 Author: mateusz779 Date: Mon Nov 4 10:30:41 2024 +0100 dodanie obliczania liczb pi diff --git a/obliczanie_pi/golang/.gitignore b/obliczanie_pi/golang/.gitignore new file mode 100644 index 0000000..e69de29 diff --git a/obliczanie_pi/golang/go.mod b/obliczanie_pi/golang/go.mod new file mode 100644 index 0000000..c05ecf5 --- /dev/null +++ b/obliczanie_pi/golang/go.mod @@ -0,0 +1,3 @@ +module mkedziora/obliczaniepi + +go 1.23.2 diff --git a/obliczanie_pi/golang/main.go b/obliczanie_pi/golang/main.go new file mode 100644 index 0000000..c4a1f5d --- /dev/null +++ b/obliczanie_pi/golang/main.go @@ -0,0 +1,101 @@ +package main + +import ( + "fmt" + "math/big" + "net/http" + "strconv" + "time" +) + +func calculatePi(n int) *big.Float { + precision := uint(n * 14) + pi := new(big.Float).SetPrec(precision) + pi.SetInt64(0) + + one := new(big.Float).SetInt64(1) + two := new(big.Float).SetInt64(2) + four := new(big.Float).SetInt64(4) + five := new(big.Float).SetInt64(5) + six := new(big.Float).SetInt64(6) + eight := new(big.Float).SetInt64(8) + sixteen := new(big.Float).SetInt64(16) + + for i := 0; i < n; i++ { + k := new(big.Float).SetInt64(int64(i)) + + // Obliczanie 16^i + powSixteen := new(big.Float).SetInt64(1) + for j := 0; j < i; j++ { + powSixteen.Mul(powSixteen, sixteen) + } + + // Obliczanie 1/16^i + denominator := new(big.Float).SetPrec(precision) + if powSixteen.Sign() != 0 { + denominator.Quo(one, powSixteen) + } else { + continue + } + + // Obliczanie poszczególnych składników + term1 := new(big.Float).SetPrec(precision) + term1.Mul(eight, k) + term1.Add(term1, one) + term1.Quo(four, term1) + + term2 := new(big.Float).SetPrec(precision) + term2.Mul(eight, k) + term2.Add(term2, four) + term2.Quo(two, term2) + + term3 := new(big.Float).SetPrec(precision) + term3.Mul(eight, k) + term3.Add(term3, five) + term3.Quo(one, term3) + + term4 := new(big.Float).SetPrec(precision) + term4.Mul(eight, k) + term4.Add(term4, six) + term4.Quo(one, term4) + + // Łączenie składników + sum := new(big.Float).SetPrec(precision) + sum.Sub(term1, term2) + sum.Sub(sum, term3) + sum.Sub(sum, term4) + + // Mnożenie przez 1/16^i i dodawanie do wyniku + sum.Mul(sum, denominator) + pi.Add(pi, sum) + } + + return pi +} + +func main() { + http.HandleFunc("/pi", func(w http.ResponseWriter, r *http.Request) { + w.Header().Set("Access-Control-Allow-Origin", "*") + + precisionStr := r.URL.Query().Get("precision") + precision, err := strconv.Atoi(precisionStr) + if err != nil { + http.Error(w, "Invalid precision parameter", http.StatusBadRequest) + return + } + + start := time.Now() + pi := calculatePi(precision) + duration := time.Since(start) + + // Format PI to specified precision + piFormatted := fmt.Sprintf("%.*f", precision, pi) + + response := fmt.Sprintf(`{"pi": "%s", "time": "%v", "language": "Go"}`, piFormatted, duration) + w.Header().Set("Content-Type", "application/json") + fmt.Fprint(w, response) + }) + + fmt.Println("Go server starting on port 8081...") + http.ListenAndServe(":8081", nil) +} diff --git a/obliczanie_pi/index.html b/obliczanie_pi/index.html new file mode 100644 index 0000000..84b2128 --- /dev/null +++ b/obliczanie_pi/index.html @@ -0,0 +1,139 @@ + + + + + + PI Calculator Comparison + + + +

PI Calculator Comparison

+ +
+ + + + +
+ +
+ + + + diff --git a/obliczanie_pi/node/.gitignore b/obliczanie_pi/node/.gitignore new file mode 100644 index 0000000..40b878d --- /dev/null +++ b/obliczanie_pi/node/.gitignore @@ -0,0 +1 @@ +node_modules/ \ No newline at end of file diff --git a/obliczanie_pi/node/index.js b/obliczanie_pi/node/index.js new file mode 100644 index 0000000..cf9cae9 --- /dev/null +++ b/obliczanie_pi/node/index.js @@ -0,0 +1,62 @@ +const express = require('express'); +const cors = require('cors'); +const app = express(); +const Decimal = require('decimal.js'); + +app.use(cors()); + +function calculatePi(n) { + Decimal.config({ precision: n * 14 }); + + let pi = new Decimal(0); + let k = 0; // Using a simple integer for k + let x = new Decimal(1); + const sixteen = new Decimal(16); + + for (let i = 0; i < n; i++) { + // Precompute common terms to avoid recalculating them + const denominator1 = new Decimal(8).times(k).plus(1); + const denominator2 = new Decimal(8).times(k).plus(4); + const denominator3 = new Decimal(8).times(k).plus(5); + const denominator4 = new Decimal(8).times(k).plus(6); + + // Calculate the contributions to pi + const term1 = Decimal.div(4, denominator1); + const term2 = Decimal.div(2, denominator2); + const term3 = Decimal.div(1, denominator3); + const term4 = Decimal.div(1, denominator4); + + // Update pi with the calculated terms + pi = pi.plus(term1.minus(term2).minus(term3).minus(term4).times(x)); + + // Increment k and update x + k++; + x = x.div(sixteen); + } + + return pi; +} + + +app.get('/pi', (req, res) => { + const precision = parseInt(req.query.precision); + + if (isNaN(precision)) { + return res.status(400).json({ error: 'Invalid precision parameter' }); + } + + const startTime = performance.now(); + const pi = calculatePi(precision); + const endTime = performance.now(); + const duration = (endTime - startTime).toFixed(6); + + res.json({ + pi: pi.toFixed(precision), + time: `${duration}ms`, + language: 'Node.js' + }); +}); + +const PORT = 8083; +console.log(`Node.js server starting on port ${PORT}...`); +app.listen(PORT); \ No newline at end of file diff --git a/obliczanie_pi/node/package.json b/obliczanie_pi/node/package.json new file mode 100644 index 0000000..5045627 --- /dev/null +++ b/obliczanie_pi/node/package.json @@ -0,0 +1,7 @@ +{ + "dependencies": { + "cors": "^2.8.5", + "decimal.js": "^10.4.3", + "express": "^4.21.1" + } +} diff --git a/obliczanie_pi/node/yarn.lock b/obliczanie_pi/node/yarn.lock new file mode 100644 index 0000000..a638f4a --- /dev/null +++ b/obliczanie_pi/node/yarn.lock @@ -0,0 +1,486 @@ +# THIS IS AN AUTOGENERATED FILE. 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b/obliczanie_pi/python/main.py new file mode 100644 index 0000000..69e74f6 --- /dev/null +++ b/obliczanie_pi/python/main.py @@ -0,0 +1,45 @@ +from flask import Flask, jsonify, request +import time +from flask_cors import CORS +from decimal import Decimal, getcontext + +app = Flask(__name__) +CORS(app) + +def calculate_pi(n): + getcontext().prec = n * 14 + pi = Decimal(0) + k = Decimal(0) + x = Decimal(1) + sixteen = Decimal(16) + + for i in range(n): + pi += (Decimal(4) / (8*k + 1) - + Decimal(2) / (8*k + 4) - + Decimal(1) / (8*k + 5) - + Decimal(1) / (8*k + 6)) * x + k += 1 + x /= 16 + + return pi + +@app.route('/pi') +def get_pi(): + try: + precision = int(request.args.get('precision', 10)) + + start_time = time.time() + pi = calculate_pi(precision) + duration = (time.time() - start_time)*1000 + + return jsonify({ + 'pi': f"{pi:.{precision}f}", + 'time': f"{duration:.6f}ms", + 'language': 'Python' + }) + except ValueError: + return jsonify({'error': 'Invalid precision parameter'}), 400 + +if __name__ == '__main__': + print("Python server starting on port 8082...") + app.run(port=8082) \ No newline at end of file diff --git a/obliczanie_pi/readme.md b/obliczanie_pi/readme.md new file mode 100644 index 0000000..580744e --- /dev/null +++ b/obliczanie_pi/readme.md @@ -0,0 +1,3 @@ +# Artykuł z porównaniem wydajności backendów + +Projekt ma na celu sprawdzenie szybkosci obliczania liczby pi za pomocą BBP formula w 3 językach - Golang, Python i JavaScript(Node.js) \ No newline at end of file diff --git a/obliczanie_pi/start.sh b/obliczanie_pi/start.sh new file mode 100755 index 0000000..a88cda3 --- /dev/null +++ b/obliczanie_pi/start.sh @@ -0,0 +1,24 @@ +#!/bin/bash + +go run ./golang/main.go & +GO_PID=$! + +pip install flask flask-cors +python3 ./python/main.py & +PYTHON_PID=$! + +cd node +yarn install +cd .. +node ./node/index.js & +NODE_PID=$! + +function stop_scripts { + echo "Zamykanie skryptów..." + kill $GO_PID $PYTHON_PID $NODE_PID + exit 0 +} + +trap stop_scripts SIGINT + +wait \ No newline at end of file diff --git a/readme.MD b/readme.MD new file mode 100644 index 0000000..2efc826 --- /dev/null +++ b/readme.MD @@ -0,0 +1 @@ +# W tym repozytorium znajdują się projekty które były pokazywane, wykorzystywane przy tworzeniu bloga [blog.mkedziora.pl](https://blog.mkedziora.pl) \ No newline at end of file