Persistent Realities » Home

Site
News
Files

Visual Basic
Strings
Math
General
Properties
Memory
Methods

Inline ASM-VB
Strings
Math
General
Memory

StrComp vs 'String1=String2'

StrComp() is 100+% faster than using Ucase, for capital unsensitive strings. I actually never knew that strComp() existed. But I think I'm going to try to implent it now where possible. This test was based on the standard method: 500.000 iterations, 5 times.

Used Code:

Code: Public Sub TestOne() Dim strTest1 As String, strTest2 As String strTest1 = UCase$("all j00r b453 r b3l0nG 70 U5") strTest2 = UCase$("ALL J00r base R Bel0NG 70 U5") '//Compare If strTest1 = strTest2 Then End If End Sub Public Sub TestTwo() Dim strTest1 As String, strTest2 As String strTest1 = "all j00r b453 r b3l0nG 70 U5" strTest2 = "ALL J00r base R Bel0NG 70 U5" '//Compare If StrComp(strTest1$, strTest2$, vbTextCompare) = 0 Then End If End Sub

UCase$ % faster than Text compare	UCase$ (sec)	Text compare (sec)
103,4%	2,491938	1,224882
109%	2,549374	1,219513
107,5%	2,536725	1,222509
103,1%	2,532701	1,246868
114,5%	2,641376	1,231344

User contributed notes:

Author: PRoPHEZZoR (prophezzor at hackermail dot com)	Date: 14:04 04/04/2004
Cool... I never knew you could compare strings using UCase()... ... I'm so funny.
Author: EACam (empyrianpale at juno dot com)	Date: 22:04 21/04/2004
You're right. I've never even heard of the StrComp function before. Cool.
Author: Sebastian Mares (sebastian at maresweb dot net)	Date: 14:05 26/05/2004
It seems that StrComp is slower than using the equal operator on Visual Basic 6: http://www.xbeat.net/vbspeed/c_IsSameString.htm
Author: Almar Joling ()	Date: 18:05 26/05/2004
They compare case sensitive, I don't? :)
Author: Zoom SpellBounder ()	Date: 10:06 29/06/2005
The use of StrComp with vbTextCompare is slower than using vbBinaryCompare. For not-so-complex strings and the use of ucase, it works better - that is, strings with chars with ASCII values between 0 and 127. Greetings, and remember: "For great justice" ;DDD