Bulat_Ziganshin

6 ms·

31.
by Bulat_Ziganshin 3y ago
i think it's American trauma. outside of the Western hemisphere, sexist and racist jokes are just jokes
32.
by Bulat_Ziganshin 3y ago
xz is a data compression tool, so it's natural to have compressed files for (de)compression tests. these files are also useful to check that the library we just built works correctly. but they aren't necessary for installation. we
33.
by Bulat_Ziganshin 3y ago
except that it doesn't support full AVX-512, making the whole idea of backward compatibility between these levels meaningless. "It's Intel!!!"
34.
by Bulat_Ziganshin 3y ago
yeah, exactly. instruction fusing can turn mov+op2 into 3-reg operation, or push+push into push2. but adding new instructions allows to increase the frontend throughput too.
35.
by Bulat_Ziganshin 3y ago
128/256-bit subset of AVX-512 already exists and implemented by P-cores as well as Zen4. They will just enable it via micro-code.
36.
by Bulat_Ziganshin 4y ago
It's actually incorrect, see https://news.ycombinator.com/item?id=32054460
37.
by Bulat_Ziganshin 4y ago
The field I've used in benchmarks is GF(0xFFF00001) which has root of unity of 0xFFF00000 = 0x100000 * 0xFFF order. Since my code implemented only FFT for 2^N sizes, it was limited to 2^20 order for this particular field and thus 2^2
38.
by Bulat_Ziganshin 4y ago
There is Leopard codec implementing very similar approach in GF(2^n). AFAIR, it's a bit slower, but overall it looks more useful than FastECC (OTOH, since we anyway store hashes and other info, we may store there extra overflow bits re
39.
by Bulat_Ziganshin 4y ago
1. As of 2017, we had quadcores as top desktop CPUs for years, and very little IPC and frequency improvements since 2011 2. But the main reason is that I can say "70 MB/s per Haswell core*GHz" and noone will feel whether it&#
40.
by Bulat_Ziganshin 5y ago
There is long NNCP thread on the forum dedicated to compression algos: https://encode.su/threads/3094-NNCP-Lossless-Data-Compressio...