I wrote a C++ program that uses MPIR 3.0.0 to compute the first million digits of pi. On a native Linux laptop with a Core i7 1.8 GHz CPU, my pi program executed in under 8 seconds.
I installed MPIR 3.0.0 on my MacBook Pro laptop with a Core i7 2.3 GHz CPU and macOS Mojave 10.14.2. The same pi program took over 135 seconds to execute. Then I used VirtualBox to install Ubuntu 18.10 in a virtual machine on my MacBook Pro laptop. I installed MPIR 3.0.0 on the Ubuntu VM, and the same pi program ran in about 7 seconds. What is going on with MPIR on macOS to cause my pi program to run so much more slowly? It's apparently not a hardware issue, since the latter two runs of my pi program were on the same laptop, but on different operating systems. Does MPIR cause macOS to generate interrupts? Interpret certain instructions? Paging? -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to mpir-devel+unsubscr...@googlegroups.com. To post to this group, send email to mpir-devel@googlegroups.com. Visit this group at https://groups.google.com/group/mpir-devel. For more options, visit https://groups.google.com/d/optout.
