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The largest benefit you can expect to get from compiling 64-bit is the ability to address more memory. Performance is a bad reason, unless you need extra floati
by ben_straub 15y ago
The largest benefit you can expect to get from compiling 64-bit is the ability to address more memory. Performance is a bad reason, unless you need extra floating-point precision or your problem is highly vectorized, and you just doubled the size of all your pointers, so you'll be getting more cache misses. I'm really interested in how they managed these downsides.
- azakai 15y agoDon't forget that 64-bit has more registers. That can be significant for performance.
- mixmastamyk 15y agoYes on x86, it is not generally the case.
- jbk 15y agoThe story is about Firefox on Windows...
- mixmastamyk 15y agoHe wrote it as if it were a universal truth. (And the downvoter can shove it.)