مقایسه سرعت اجرای انواع داده ها در vb

[sadegi]

با عرض سلام
تو فایل متنی زیر یک سری آزمایش برای مقایسه سرعت اجرای انواع داده ها با هم شده که فکر کنم دیدن نتیجه آزمایش خالی از لطف نباشه
:flower: :flower: :flower:

[بابک زواری]

ممنون با اجازتون من محتوی فایل رو هم اینجا گذاشتم


All tests are made in a For loop (except the loop tests)
looping from 1 to 5,000,000. Each test was run three times,
and the results are the averages. The times themselves are
in seconds.

Test Result1 Result2 Difference %
-------------------------------+-------+-------+-------------
byte v integer 1.124 0.752 66%
integer v boolean 0.761 0.761 0%
integer v long 0.742 0.741 0.1%
boolean v long 0.751 0.751 0%
long v single 0.751 0.902 20%
long v double 0.741 0.891 20%
single v double 0.901 0.901 0%
fixed str v variable str 2.433 2.995 23%
variable str v .Tag property 2.994 6.910 130%

add v subtract 0.751 0.741 1%
float division v multiply 1.392 0.971 43%
integer division v multiply 0.902 0.971 7%

proc v func (private) 3.465 6.178 56%
proc v func (public) 3.465 6.069 57%
function v control property 6.158 3.005 105%
optional parameter v parameter 3.625 3.676 1%
parentheses v no parentheses 3.685 3.625 1%

if v select 0.902 1.842 102%
for v do loop 0.230 1.002 335%
while v do loop 1.382 1.061 24%
do loop v do until 1.112 1.113 0.1%
-------------------------------+-------+-------+-------------

Data types from fastest to slowest are; Boolean, integer,
long, single, double, byte, fixed length string, variable
length string.

Fixed length strings are faster than variable length strings.
Test was done with 10 characters.

When dividing, use integer division if possible (\) or
multiplying if floating point precision is needed.

Procedures are faster than functions, but there is little
difference in speed between public and private. Using no
parentheses when calling the procedure is faster than
calling your procedure with them. The Call statement in
itself does not cause any speed difference. Enevitably,
the more parameters and local variables within your
procedures or functions, the more it will slow it down.
Using optional parameters can help to speed up your sub-
routine slightly.

Use if statements whenever possible

Use for loops whenever possible

Use Do While...Loop instead of While...Wend

One of the slowest things you can do in vb is to set the
property of a control. Avoid where possible.

[sadegi]

لا تشکر از شما دوست عزیز
من هم میخواستم چنین کاری بکنم ولی نمیدونم چرا نظم ستون ها به هم میخوره

[sadegi]

با تشکر از شما دوست عزیز
من هم میخواستم چنین کاری بکنم ولی نمیدونم چرا نظم ستون ها به هم میخوره

[R_BABAZADEH]

جالب بود :تشویق: