Name		Name	Last commit message	Last commit date
parent directory ..
.gitignore		.gitignore
Makefile		Makefile
README.rst		README.rst
benchmark.cpp		benchmark.cpp
common.cpp		common.cpp
parse.naive.cpp		parse.naive.cpp
parse.sse.cpp		parse.sse.cpp
parse.ssse3.cpp		parse.ssse3.cpp
parse.swar.cpp		parse.swar.cpp
procedures.cpp		procedures.cpp
verify.cpp		verify.cpp

README.rst

Convert a string (dec) to value

SWAR version: naive and 3 different attempts to improve certain parts of naive conversion. For details see full article.
SSE and SSSE3 version, see full article.

Performance comparison

Output from the program benchmark.

Core i5 M540 @ 2.53GHz

method	time [us]	speedup
naive	247514	1.00
SWAR (1)	158043	1.57
SWAR (2)	148712	1.66
SWAR (3)	125978	1.96
SSE	37704	6.56
SSSE3	27271	9.07

Skylake Core i7-6700 CPU @ 3.40GHz

method	time [us]	speedup
naive	131904	1.00
SWAR (1)	84933	1.55
SWAR (2)	84945	1.55
SWAR (3)	75862	1.74
SSE	18698	7.05
SSSE3	17693	7.45