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Old 2020-08-25, 17:13   #8
pxp's Avatar
Sep 2010
Weston, Ontario

19510 Posts

Originally Posted by rogue View Post
I have made changes to xyyxsieve (code is committed, but exe is not on sourceforge yet) to reduce the memory usage of the program. In the previous version, a range of 1000 x can take 8 GB of memory (ouch). The changes have reduced that memory requirement by a factor of 10. Another good result of that change is a boost in speed by about 30%.
You had previously provided me with an OS X version of this (xyyxsieve.7z). As I am currently entering a phase where I will be sieving millions of large numbers, a 30% boost looks pretty good right now. I had started a sieve to 5e9 on interval #21 back on August 12 and it is currently at 8% with an ETC of mid-January. Ouch!
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