Overview
Examples
Screenshots
Comparisons
Applications
Download
Documentation
Tutorials
Bazaar
Status & Roadmap
FAQ
Authors & License
Forums
Funding Ultimate++
Search on this site
Search in forums












SourceForge.net Logo
Home » Developing U++ » U++ Developers corner » SSE2 and SVO optimization (Painter, memcpy....)
Re: BufferPainter::Clear() optimization [message #54007 is a reply to message #54006] Wed, 20 May 2020 17:31 Go to previous messageGo to previous message
mirek is currently offline  mirek
Messages: 13975
Registered: November 2005
Ultimate Member
I am getting quite different picture:

	int bsize=8*1024*1024;
	Buffer<dword> b(bsize, 0);
	dword cw = 123;

	String result="\"N\",\"memsetd()\",\"Fill3T3()\"\r\n";
	for(int len=1;len<=bsize;){
		int maximum=100000000/len;
		int64 t0=usecs();
		for(int i = 0; i < maximum; i++)
			memsetd(~b, cw, len);
		int64 t1=usecs();
		for(int i = 0; i < maximum; i++)
			Fill3T3(~b, cw, len);
		int64 t2=usecs();
		String r = Format("%d,%f,%f",len,1000.0*(t1-t0)/maximum,1000.0*(t2-t1)/maximum);
		RLOG(r);
		result.Cat(r + "\r\n");
		if(len<64) len++;
		else len*=2;
	}
	
	SaveFile(GetHomeDirFile("memset.csv"),result);


I am starting to wonder if there is difference between our MSC 32bit compilers...
  • Attachment: memset.csv
    (Size: 1.90KB, Downloaded 137 times)
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Should we still care about big-endian CPUs?
Next Topic: TheIDE crash after switching package
Goto Forum:
  


Current Time: Mon May 06 09:17:09 CEST 2024

Total time taken to generate the page: 0.02686 seconds