understeer

Latency Comparison Numbers
--------------------------
L1 cache reference/hit                       1.5 ns                      4 cycles
Floating-point add/mult/FMA operation        1.5 ns                      4 cycles
L2 cache reference/hit                       5   ns                      12 ~ 17 cycles
Branch mispredict                            6   ns                      15 ~ 20 cycles
L3 cache hit (unshared cache line)          16   ns                      42 cycles
L3 cache hit (shared line in another core)  25   ns                      65 cycles
Mutex lock/unlock                           25   ns
L3 cache hit (modified in another core)     29   ns                      75 cycles

zmwangx

Markdown, LaTeX, etc.

Caution

• (10/30/2016) I am not sure when and how this gist gained quite a few stars... But as stated in the v1.13 change log (from 06/16/2015): some content may be outdated, and I am not going to fix them. Moreover, having learned much myself, I do not necessarily agree with every point made in this document from 2.5 years ago. Therefore, please take views from this document with a grain of salt, and do further research as you see fit.

• This document was initally written for a friend of mine, Jiawen Li, so it might reflect some personal tastes here and there. For instance, some discussions are geared towards Windows, though *nix is obviously superior. For another example, when I say "you seem to love Sublime Text a lot," I'm certainly not expecting most people to love Sublime (in fact I never used it for more than three minutes in a row).

• This document is written in Markdown. The Markdown rendering engine on GitHub Gist is somewhat limited a