One reason that naive sharing fails in the echo server example is that the read–update–write sequence needed for C instruction counter += n may not be a single instruction in machine code. To how many x86-64 instruction(s) does this C instruction translate, when no complier optimizations are used?

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.