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Re: BufferPainter::Clear() optimization [message #53919 is a reply to message #53751] Fri, 15 May 2020 12:16 Go to previous messageGo to previous message
Oblivion is currently offline  Oblivion
Messages: 1281
Registered: August 2007
Senior Contributor
On linux with the relatively old AMD Athlon FX 6100.

Works with both GCC (9.3) and CLANG (10.0). Requires #include <smmintrin.h>:

GCC:
TIMING SSEFill2       : 43,99 ms -  4,40 ms (44,00 ms / 10 ), min:  4,00 ms, max:  5,00 ms, nesting: 0 - 10
TIMING CoFill         : 55,99 ms -  5,60 ms (56,00 ms / 10 ), min:  5,00 ms, max:  6,00 ms, nesting: 0 - 10
TIMING Fill           : 75,99 ms -  7,60 ms (76,00 ms / 10 ), min:  7,00 ms, max:  8,00 ms, nesting: 0 - 10
TIMING memsetd        : 66,99 ms -  6,70 ms (67,00 ms / 10 ), min:  5,00 ms, max: 17,00 ms, nesting: 0 - 10



CLANG:
TIMING SSEFill2       : 45,99 ms -  4,60 ms (46,00 ms / 10 ), min:  4,00 ms, max:  7,00 ms, nesting: 0 - 10
TIMING CoFill         : 55,99 ms -  5,60 ms (56,00 ms / 10 ), min:  5,00 ms, max:  6,00 ms, nesting: 0 - 10
TIMING Fill           : 65,99 ms -  6,60 ms (66,00 ms / 10 ), min:  6,00 ms, max: 10,00 ms, nesting: 0 - 10
TIMING memsetd        : 78,99 ms -  7,90 ms (79,00 ms / 10 ), min:  5,00 ms, max: 23,00 ms, nesting: 0 - 10


[Updated on: Fri, 15 May 2020 12:27]

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