dodanie obliczania liczb pi

This commit is contained in:
mateusz779 2024-11-04 10:30:41 +01:00
commit ae9acbd83c
13 changed files with 873 additions and 0 deletions

0
obliczanie_pi/golang/.gitignore vendored Normal file
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module mkedziora/obliczaniepi
go 1.23.2

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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)
}

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obliczanie_pi/index.html Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>PI Calculator Comparison</title>
<style>
body {
font-family: Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
}
.results {
margin-top: 20px;
}
.result {
margin: 10px 0;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
}
input,
button {
margin: 10px 0;
padding: 5px;
}
</style>
</head>
<body>
<h1>PI Calculator Comparison</h1>
<div>
<label for="precision">Precision (decimal places):</label>
<input type="number" id="precision" value="1000" min="1" max="100" />
<button onclick="calculateAll()">Calculate in All Languages</button>
<button onclick="autoCalc()">Calculate to</button>
</div>
<div class="results" id="results"></div>
<script>
const endpoints = [
"http://localhost:8081", // Go
"http://localhost:8082", // Python
"http://localhost:8083", // Node.js
];
async function calculatePi(endpoint, precision, index) {
try {
await new Promise((resolve) =>
setTimeout(resolve, (index - 1) * 500)
);
const response = await fetch(`${endpoint}/pi?precision=${precision}`);
const data = await response.json();
return data;
} catch (error) {
return {
error: `Failed to fetch from ${endpoint}: ${error.message}`,
};
}
}
async function autoCalc() {
const resultsDiv = document.getElementById("results");
const precision_max = document.getElementById("precision").value;
resultsDiv.innerHTML = "<h2>Calculating...</h2>";
let allResults = "";
for (
let precision = 100;
precision <= precision_max;
precision += 100
) {
allResults += `\n\nPrecision ${precision}:\n`;
// Wykonaj 5 testów dla każdej precyzji
for (let test = 1; test <= 5; test++) {
const results = await Promise.all(
endpoints.map((endpoint, index) =>
calculatePi(endpoint, precision, index)
)
);
allResults += `Test ${test}:\n`;
results.forEach((result) => {
if (!result.error) {
allResults += `${result.language},${result.time}\n`;
}
});
if (test < 5) {
await new Promise((resolve) => setTimeout(resolve, 500)); // 1 sekunda przerwy między testami
}
}
if (precision < precision_max) {
await new Promise((resolve) => setTimeout(resolve, 500)); // 2 sekundy przerwy przed następną precyzją
}
}
resultsDiv.innerHTML = "<h2>Results:</h2>";
const pre = document.createElement("pre");
pre.textContent = allResults;
resultsDiv.appendChild(pre);
}
async function calculateAll() {
const precision = document.getElementById("precision").value;
const resultsDiv = document.getElementById("results");
resultsDiv.innerHTML = "<h2>Calculating...</h2>";
const results = await Promise.all(
endpoints.map((endpoint, index) =>
calculatePi(endpoint, precision, index)
)
);
resultsDiv.innerHTML = "<h2>Results:</h2>";
results.forEach((result) => {
const resultDiv = document.createElement("div");
resultDiv.className = "result";
if (result.error) {
resultDiv.innerHTML = `<p>Error: ${result.error}</p>`;
} else {
resultDiv.innerHTML = `
<h3>${result.language}</h3>
<p>PI: ${result.pi}</p>
<p>Calculation time: ${result.time}</p>
`;
}
resultsDiv.appendChild(resultDiv);
});
}
</script>
</body>
</html>

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obliczanie_pi/node/.gitignore vendored Normal file
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node_modules/

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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);

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{
"dependencies": {
"cors": "^2.8.5",
"decimal.js": "^10.4.3",
"express": "^4.21.1"
}
}

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ee-first "1.1.1"
parseurl@~1.3.3:
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proxy-addr@~2.0.7:
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forwarded "0.2.0"
ipaddr.js "1.9.1"
qs@6.13.0:
version "6.13.0"
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dependencies:
side-channel "^1.0.6"
range-parser@~1.2.1:
version "1.2.1"
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bytes "3.1.2"
http-errors "2.0.0"
iconv-lite "0.4.24"
unpipe "1.0.0"
safe-buffer@5.2.1:
version "5.2.1"
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debug "2.6.9"
depd "2.0.0"
destroy "1.2.0"
encodeurl "~1.0.2"
escape-html "~1.0.3"
etag "~1.8.1"
fresh "0.5.2"
http-errors "2.0.0"
mime "1.6.0"
ms "2.1.3"
on-finished "2.4.1"
range-parser "~1.2.1"
statuses "2.0.1"
serve-static@1.16.2:
version "1.16.2"
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encodeurl "~2.0.0"
escape-html "~1.0.3"
parseurl "~1.3.3"
send "0.19.0"
set-function-length@^1.2.1:
version "1.2.2"
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es-errors "^1.3.0"
function-bind "^1.1.2"
get-intrinsic "^1.2.4"
gopd "^1.0.1"
has-property-descriptors "^1.0.2"
setprototypeof@1.2.0:
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es-errors "^1.3.0"
get-intrinsic "^1.2.4"
object-inspect "^1.13.1"
statuses@2.0.1:
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media-typer "0.3.0"
mime-types "~2.1.24"
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1
obliczanie_pi/python/.gitignore vendored Normal file
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@ -0,0 +1 @@
venv/

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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)

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obliczanie_pi/readme.md Normal file
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# 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)

24
obliczanie_pi/start.sh Executable file
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#!/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

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readme.MD Normal file
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# W tym repozytorium znajdują się projekty które były pokazywane, wykorzystywane przy tworzeniu bloga [blog.mkedziora.pl](https://blog.mkedziora.pl)