SHLD isn't Any Faster than IMUL

https://software.intel.com/sites/default/files/managed/9e/bc/64-ia-32-architectures-optimization-manual.pdf


see instruction latency appendix. That means you can multiply without any hacks. But division is still much more expensive than right shift.

>>11
Meltdown is not a problem if you do not have buggy programs that let the glowing ones run code on your machine. Meanwhile timing attacks are a real threat - even if all of your programs are bug free some asshole can steal all of your private keys.