C/C++ Performance Tests - Summary (GNU g++ compiler)

[Alex Vinokur]

 

C/C++ Performance Tests

Using C/C++ Program Perfometer

http://sourceforge.net/projects/cpp-perfometer

http://alexvn.freeservers.com/s1/perfometer.html

 

C/C++ PerfoTester Release: 1.0

http://sourceforge.net/projects/cpp-perfometer (Package Name: PerfoTester)

 

 

Environment

Windows 2000 Professional

CYGWIN_NT-5.0 1.3.22(0.78/3/2)

Intel(R) Celeron(R) CPU 1.70 GHz

GNU gcc/g++ version 3.2 20020927 (prerelease)

Compilation : No optimization

 

 

 

Method	Data Type	Performance for size			Unit of Measurement = milliseconds/per-times
		10	100	1000	Iterations	Per-times
C-string initialization
http://groups.google.com/address@hidden
init (char* x = y)	char*	4	4	4	5000000	1000000
init (char[] x = y)	char[]	5	232	402
string initialization (C vs. STL)
http://groups.google.com/address@hidden
malloc & free	char[]	132	162	162	500000	100000
(malloc+strcpy) & free	char[]	137	179	274
(malloc+memset) & free	char[]	161	187	217
ctor & dtor	string	30	30	30
new & delete	string	223	274	892
string length (C vs. STL)
http://groups.google.com/address@hidden
strlen	char[]	222	693	5410	5000000	1000000
string.size()	string	16	15	15
string assigment and addition (C vs. STL) - 1
http://groups.google.com/address@hidden
strcpy	char[]	6	22	147	500000	100000
operator=	string	3	3	3
strcat (with cutting off)	char[]	10	26	152
operator+= (with erase)	string	100	112	184
operator+ (with erase)	string	234	234	508
string assignment and addition (C vs. STL) -2
http://groups.google.com/address@hidden
accumulated strcat (with cutting off)	char[]	1090	1194	1277	50000	10000
accumulated operator+= (with erase)	string	10	12	20
accumulated operator+ (with erase)	string	6311	6993	7280
find method vs. find algorithm
http://groups.google.com/address@hidden
find algorithm	vector<int>	2	8	69	50000	10000
find algorithm	list<int>	2	15	142
find algorithm	set<int>	3	22	217
find method	set<int>	2	4	4
find method	map<int>	2	4	4
for-loop vs. for_each
http://groups.google.com/address@hidden
for-loop	vector<uint>	13	124	1225	50000	10000
for-loop	string	14	120	1189
for-loop	list<uint>	15	133	1330
for-loop	set<uint>	13	129	1311
for_each	vector<uint>	10	92	915
for_each	string	10	93	917
for_each	list<uint>	9	78	773
for_each	set<uint>	12	104	1070
access to element
http://groups.google.com/address@hidden
operator[]	char[]	5	5	4	5000000	1000000
operator[]	vector<char>	90	90	90
operator[]	string	34	34	33
at method	vector<char>	222	222	223
at method	string	32	33	33
calling functions : templated vs. non-templated
http://groups.google.com/address@hidden
templated function	int	16			5000000	1000000
ordinary function	int	5
templated function	string	344	345	345
ordinary function	string	344	345	350

 

 

 

Alex Vinokur

     mailto:address@hidden

     http://mathforum.org/library/view/10978.html

 

 

20 June 2003