Thanks ...
On Sun, Nov 24, 2013 at 3:14 PM, Ben Noordhuis <i...@bnoordhuis.nl> wrote: > On Sun, Nov 24, 2013 at 8:08 PM, Mark Hahn <m...@reevuit.com> wrote: > >> Running a 32 bits binary on a 64 bits operating system is certainly > >> possible but system call performance generally takes a hit. > > > > I thought it was the opposite. All 64-bit does is give you more address > > space. 64-bit is slower because the code is larger and fewer > instructions > > fit in cache. > > It's more nuanced than that. Instructions that deal with immediate > values are larger but position independent code tends to be smaller > and more efficient due to RIP-relative addressing. > > There are more registers so data gets spilled to the stack less often. > Ditto for function calls, there's more opportunity to pass arguments > in registers. > > The reason why system call performance suffers with 32 bits binaries > on 64 bit hosts, is that every system call goes through a thunk that > switches modes and converts arguments and the return value. > > -- > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to nodejs@googlegroups.com > To unsubscribe from this group, send email to > nodejs+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "nodejs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to nodejs+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to nodejs@googlegroups.com To unsubscribe from this group, send email to nodejs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to nodejs+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
