Yes, I understand. I did a quick benchmark to get a ballpark figure for his 10 large integer multiplications, and using GMP's basecase code (which is much slowe

Yes, I understand. I did a quick benchmark to get a ballpark figure for his 10 large integer multiplications, and using GMP's basecase code (which is much slower than the asymptotically faster algorithms it provides) I get about 2ms on my machine. Assuming his machine is a similar speed to mine, that puts him only a factor of about 4 behind GMP. That's actually pretty good. You need a pretty modern GCC to do that in C. So I will be interested in seeing what he finally releases. The addition timings don't seem realistic. GMP can add 1000 small integers in 10 uS without even getting out the assembly primitives.