Brythonの実行時間

概要

Python3、JavaScriptとBrythonの実行時間を比較してみる。

数値演算

Python/Brythonコード

import time

start = time.time()
a = 1
b = 2

for i in range(1000000):
    c = a + b

elapsed_time = time.time() - start
print("elapsed time: %fsec" % elapsed_time)

import time

start = time.time()

a = 1

b = 2

for i in range(1000000):

c = a + b

elapsed_time = time.time() - start

print("elapsed time: %fsec" % elapsed_time)

JavaScriptコード

var startTime = ( new Date() ).valueOf();

var a = 1;
var b = 2;

for ( i = 0; i < 1000000; i++ ) {
    var c = a + b;
}

elapsedTime = ( new Date() ).valueOf() - startTime;
console.log( "elapsed time: " + parseFloat(elapsedTime).toFixed(6) + "sec" );

var startTime = ( new Date() ).valueOf();

var a = 1;

var b = 2;

for ( i = 0; i < 1000000; i++ ) {

var c = a + b;

}

elapsedTime = ( new Date() ).valueOf() - startTime;

console.log( "elapsed time: " + parseFloat(elapsedTime).toFixed(6) + "sec" );

結果

	経過時間
Python3	0.152009sec
Brython	3.068000sec
JavaScript	3.000000sec

配列の確保

Python/Brython

import time

start = time.time()

for i in range(1000):
    a = [0 for i in range(100)]

elapse = time.time() - start
print("elapsed time: %fsec" % elapse)

import time

start = time.time()

for i in range(1000):

a = [0 for i in range(100)]

elapse = time.time() - start

print("elapsed time: %fsec" % elapse)

JavaScript

var startTime = ( new Date() ).valueOf();

var array = [];
for ( i = 0; i < 1000; i++ ) {
    for ( j = 0; j < 100; j++ ) {
        array[j] = 0;
    }
}

elapsedTime = ( new Date() ).valueOf() - startTime;
console.log( "elapsed time: " + parseFloat(elapsedTime).toFixed(6) + "sec" );

var startTime = ( new Date() ).valueOf();

var array = [];

for ( i = 0; i < 1000; i++ ) {

for ( j = 0; j < 100; j++ ) {

array[j] = 0;

}

elapsedTime = ( new Date() ).valueOf() - startTime;

console.log( "elapsed time: " + parseFloat(elapsedTime).toFixed(6) + "sec" );

結果

	経過時間
Python3	0.006001sec
Brython	8.212000sec
JavaScript	2.000000sec

TauStation

Brythonの実行時間

概要

数値演算

配列の確保

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概要

数値演算

配列の確保

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