why vb code faster than csharp???# Programming - 葵花宝典
s*1
1 楼
芝加哥北郊Glenview 诚请保姆, 照顾一个刚2岁的女孩. 住家或往返都考虑. 每周5-6
天. 工作量轻, 待遇优, 住宿环境好. 请电8477304009.
天. 工作量轻, 待遇优, 住宿环境好. 请电8477304009.
e*r
2 楼
Anybody can tell why vb.net codes for looping is faster than Csharp?
s*o
3 楼
How do you know that vb.net is faster than C# for looping?
v*n
4 楼
it's possible that VB compiler does more optimization than C# compiler
【在 e*****r 的大作中提到】
: Anybody can tell why vb.net codes for looping is faster than Csharp?
【在 e*****r 的大作中提到】
: Anybody can tell why vb.net codes for looping is faster than Csharp?
a*l
5 楼
it's much more possible that LZ just mistakenly thought vb is faster. VB,
especially after VB6, is based on .net framework, so its code is not much
different from C# code.
【在 v******n 的大作中提到】
: it's possible that VB compiler does more optimization than C# compiler
especially after VB6, is based on .net framework, so its code is not much
different from C# code.
【在 v******n 的大作中提到】
: it's possible that VB compiler does more optimization than C# compiler
e*r
6 楼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;
using System.IO;
namespace My_Speed_Test
{
class Program
{
static void Main(string[] args)
{
DateTime tic = DateTime.Now;
UInt32 d=200;
double dd = 200;
int s = 0;
for (int a=1;a<=10000;a++)
{
for (int b=1;b<=10000;b++)
{
for (int c=1;c<=10;c++)
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;
using System.IO;
namespace My_Speed_Test
{
class Program
{
static void Main(string[] args)
{
DateTime tic = DateTime.Now;
UInt32 d=200;
double dd = 200;
int s = 0;
for (int a=1;a<=10000;a++)
{
for (int b=1;b<=10000;b++)
{
for (int c=1;c<=10;c++)
e*r
7 楼
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim a, b, c, s As Integer
s = 0
Dim d As Integer
d = 250
Dim dd As Double
dd = 250
Dim tic, toc As String
tic = (Now().Millisecond) / 1000 + Now().Second + (Now().Minute) *
60
For a = 1 To 10000
For b = 1 To 10000
For c = 1 To 10
dd = dd * 5.1234567
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim a, b, c, s As Integer
s = 0
Dim d As Integer
d = 250
Dim dd As Double
dd = 250
Dim tic, toc As String
tic = (Now().Millisecond) / 1000 + Now().Second + (Now().Minute) *
60
For a = 1 To 10000
For b = 1 To 10000
For c = 1 To 10
dd = dd * 5.1234567
e*r
8 楼
above are C# codes and vb.net codes respectively(both compiled by vs.net 2008 Express):
In my laptop, results for speed testing:
Matlab:
ver 7.1: limit of array size overlimit for 1E4*1e4*1e1 size, has to
change to loop format 20x for loop
Total time: 38.01second
VB.net: total loop 1e9 (1 billion)
total time: 18.64 second
VSharp.net:
total time:21.5 second!!!
netSDK_CSC:
total time: 21.625 second!!!
Python 2.5:
10000x1000x10 loops with For-Loop (it's a very special one!)
In my laptop, results for speed testing:
Matlab:
ver 7.1: limit of array size overlimit for 1E4*1e4*1e1 size, has to
change to loop format 20x for loop
Total time: 38.01second
VB.net: total loop 1e9 (1 billion)
total time: 18.64 second
VSharp.net:
total time:21.5 second!!!
netSDK_CSC:
total time: 21.625 second!!!
Python 2.5:
10000x1000x10 loops with For-Loop (it's a very special one!)
e*r
9 楼
It can't be interpreted simply by "overhead" costs (>3 second difference
between vb.net and C# codes), since there is no overhead (to my
understanding) between the two. CIL codes for both C# and VB.net should be
the same for both, aren't they?
I have been expecting vb.net "FOR loop" will be slower than that of C# due to
some overhead costs, but instead! no!
between vb.net and C# codes), since there is no overhead (to my
understanding) between the two. CIL codes for both C# and VB.net should be
the same for both, aren't they?
I have been expecting vb.net "FOR loop" will be slower than that of C# due to
some overhead costs, but instead! no!
c*t
10 楼
why not use exactly same init and format for both VB.NET and C#?
to
【在 e*****r 的大作中提到】
: It can't be interpreted simply by "overhead" costs (>3 second difference
: between vb.net and C# codes), since there is no overhead (to my
: understanding) between the two. CIL codes for both C# and VB.net should be
: the same for both, aren't they?
: I have been expecting vb.net "FOR loop" will be slower than that of C# due to
: some overhead costs, but instead! no!
to
【在 e*****r 的大作中提到】
: It can't be interpreted simply by "overhead" costs (>3 second difference
: between vb.net and C# codes), since there is no overhead (to my
: understanding) between the two. CIL codes for both C# and VB.net should be
: the same for both, aren't they?
: I have been expecting vb.net "FOR loop" will be slower than that of C# due to
: some overhead costs, but instead! no!
g*n
11 楼
你反编译一下Assembly，看一下生成的IL指令不就知道原因了？
相关阅读
百度AI部分也换人看看烙印怎么说转行的有没有开源的configurable workflow库推荐？中软外包公司加班过度的程序员永远倒下了swift是脑子被驴踢了，这帮孙子都是吃屎的爱德蒙·贝拉米肖像提高 Marketing email 的送达率专利批准了，还有16年可用。。。tabnine非常牛Which No-Sql is closed to mysql ?统计的兄弟们，可能需要有点紧迫感Richard Sutton: The bitter lesson 算力常胜Java hibernate exception，如何debug比较好？关于诈骗的定义人工智能和煉金術Node.js里将blocking call转换成non blocking call的办法原来这个东西叫做Conway’s lawzt 零编程基础须会big data应学哪个软件，有online course/video (转载)MSFT破万亿了python训练的模型， 能包成 C/C++的dll吗